Make it run on Catalina

closes #158, closes #77

NearDrop.xcodeproj/project.pbxproj

@@ -662,7 +662,7 @@
 					"@executable_path/../Frameworks",
 					"@executable_path/../../../../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				MARKETING_VERSION = 2.0.2;
 				PRODUCT_BUNDLE_IDENTIFIER = me.grishka.NearDrop.ShareExtension;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -688,7 +688,7 @@
 					"@executable_path/../Frameworks",
 					"@executable_path/../../../../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				MARKETING_VERSION = 2.0.2;
 				PRODUCT_BUNDLE_IDENTIFIER = me.grishka.NearDrop.ShareExtension;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -749,7 +749,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -804,7 +804,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SDKROOT = macosx;
@@ -823,7 +823,7 @@
 				CODE_SIGN_ENTITLEMENTS = NearDrop/NearDrop.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 7;
+				CURRENT_PROJECT_VERSION = 8;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
 				INFOPLIST_KEY_LSUIElement = YES;
@@ -834,8 +834,8 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.4;
 				PRODUCT_BUNDLE_IDENTIFIER = me.grishka.NearDrop;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
@@ -855,7 +855,7 @@
 				CODE_SIGN_ENTITLEMENTS = NearDrop/NearDrop.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 7;
+				CURRENT_PROJECT_VERSION = 8;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
 				INFOPLIST_KEY_LSUIElement = YES;
@@ -866,8 +866,8 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
-				MARKETING_VERSION = 2.0.3;
+				MARKETING_VERSION = 2.0.4;
 				PRODUCT_BUNDLE_IDENTIFIER = me.grishka.NearDrop;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
@@ -885,7 +885,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@executable_path/../Frameworks";
 				EXECUTABLE_PREFIX = lib;
 				LD_DYLIB_INSTALL_NAME = "$(DYLIB_INSTALL_NAME_BASE:standardizepath)/$(EXECUTABLE_PATH)";
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;
@@ -901,7 +901,7 @@
 				DYLIB_INSTALL_NAME_BASE = "@executable_path/../Frameworks";
 				EXECUTABLE_PREFIX = lib;
 				LD_DYLIB_INSTALL_NAME = "$(DYLIB_INSTALL_NAME_BASE:standardizepath)/$(EXECUTABLE_PATH)";
-				MACOSX_DEPLOYMENT_TARGET = 11.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.15;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_VERSION = 5.0;

NearDrop/AppDelegate.swift

@@ -34,7 +34,10 @@ class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCenterDele
 			}
 		}
 		nc.delegate=self
-		let incomingTransfersCategory=NDNotificationCenterHackery.hackedNotificationCategory()
+		let incomingTransfersCategory=UNNotificationCategory(identifier: "INCOMING_TRANSFERS", actions: [
+			UNNotificationAction(identifier: "ACCEPT", title: NSLocalizedString("Accept", comment: ""), options: UNNotificationActionOptions.authenticationRequired),
+			UNNotificationAction(identifier: "DECLINE", title: NSLocalizedString("Decline", comment: ""))
+		], intentIdentifiers: [])
 		let errorsCategory=UNNotificationCategory(identifier: "ERRORS", actions: [], intentIdentifiers: [])
 		nc.setNotificationCategories([incomingTransfersCategory, errorsCategory])
 		NearbyConnectionManager.shared.mainAppDelegate=self
@@ -79,9 +82,6 @@ class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCenterDele
 	}
 	
 	func obtainUserConsent(for transfer: TransferMetadata, from device: RemoteDeviceInfo) {
-		let notificationContent=UNMutableNotificationContent()
-		notificationContent.title="NearDrop"
-		notificationContent.subtitle=String(format:NSLocalizedString("PinCode", value: "PIN: %@", comment: ""), arguments: [transfer.pinCode!])
 		let fileStr:String
 		if let textTitle=transfer.textDescription{
 			fileStr=textTitle
@@ -90,14 +90,19 @@ class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCenterDele
 		}else{
 			fileStr=String.localizedStringWithFormat(NSLocalizedString("NFiles", value: "%d files", comment: ""), transfer.files.count)
 		}
+		let notificationContent=UNMutableNotificationContent()
+		notificationContent.title="NearDrop"
+		notificationContent.subtitle=String(format:NSLocalizedString("PinCode", value: "PIN: %@", comment: ""), arguments: [transfer.pinCode!])
 		notificationContent.body=String(format: NSLocalizedString("DeviceSendingFiles", value: "%1$@ is sending you %2$@", comment: ""), arguments: [device.name, fileStr])
 		notificationContent.sound = .default
 		notificationContent.categoryIdentifier="INCOMING_TRANSFERS"
 		notificationContent.userInfo=["transferID": transfer.id]
+		if #available(macOS 11.0, *){
 			NDNotificationCenterHackery.removeDefaultAction(notificationContent)
+		}
 		let notificationReq=UNNotificationRequest(identifier: "transfer_"+transfer.id, content: notificationContent, trigger: nil)
-		self.activeIncomingTransfers[transfer.id]=TransferInfo(device: device, transfer: transfer)
 		UNUserNotificationCenter.current().add(notificationReq)
+		self.activeIncomingTransfers[transfer.id]=TransferInfo(device: device, transfer: transfer)
 	}
 	
 	func incomingTransfer(id: String, didFinishWith error: Error?) {
@@ -107,8 +112,8 @@ class AppDelegate: NSObject, NSApplicationDelegate, UNUserNotificationCenterDele
 			notificationContent.title=String(format: NSLocalizedString("TransferError", value: "Failed to receive files from %@", comment: ""), arguments: [transfer.device.name])
 			if let ne=(error as? NearbyError){
 				switch ne{
-				case .inputOutput(let er):
+				case .inputOutput:
-					notificationContent.body=er.localizedDescription
+					notificationContent.body="I/O Error";
 				case .protocolError(_):
 					notificationContent.body=NSLocalizedString("Error.Protocol", value: "Communication error", comment: "")
 				case .requiredFieldMissing:

NearDrop/MainMenu.xib

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="21701" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="22505" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
     <dependencies>
         <deployment identifier="macosx"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="21701"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="22505"/>
     </dependencies>
     <objects>
         <customObject id="-2" userLabel="File's Owner" customClass="NSApplication">

NearDrop/NDNotificationCenterHackery.h

@@ -12,7 +12,6 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface NDNotificationCenterHackery : NSObject
 
-+ (UNNotificationCategory*)hackedNotificationCategory;
 + (void)removeDefaultAction:(UNMutableNotificationContent*) content;
 
 @end

NearDrop/NDNotificationCenterHackery.m

@@ -35,13 +35,6 @@
 
 @implementation NDNotificationCenterHackery
 
-+ (UNNotificationCategory*)hackedNotificationCategory{
-	UNNotificationAction *accept=[UNNotificationAction actionWithIdentifier:@"ACCEPT" title:NSLocalizedString(@"Accept", nil) options:0];
-	UNNotificationAction *decline=[UNNotificationAction actionWithIdentifier:@"DECLINE" title:NSLocalizedString(@"Decline", nil) options:0];
-	UNMutableNotificationCategory *category=[UNMutableNotificationCategory categoryWithIdentifier:@"INCOMING_TRANSFERS" actions:@[accept, decline] intentIdentifiers:@[] hiddenPreviewsBodyPlaceholder:@"" options: UNNotificationCategoryOptionCustomDismissAction];
-	return category;
-}
-
 + (void)removeDefaultAction:(UNMutableNotificationContent*) content{
 	content.hasDefaultAction=false;
 }

NearbyShare/InboundNearbyConnection.swift

@@ -103,7 +103,7 @@ class InboundNearbyConnection: NearbyConnection{
 		guard frame.payloadChunk.offset==currentOffset else { throw NearbyError.protocolError("Invalid offset into file \(frame.payloadChunk.offset), expected \(currentOffset)") }
 		guard currentOffset+Int64(frame.payloadChunk.body.count)<=fileInfo.meta.size else { throw NearbyError.protocolError("Transferred file size exceeds previously specified value") }
 		if frame.payloadChunk.body.count>0{
-			try fileInfo.fileHandle?.write(contentsOf: frame.payloadChunk.body)
+			fileInfo.fileHandle?.write(frame.payloadChunk.body)
 			transferredFiles[id]!.bytesTransferred+=Int64(frame.payloadChunk.body.count)
 			fileInfo.progress?.completedUnitCount=transferredFiles[id]!.bytesTransferred
 		}else if (frame.payloadChunk.flags & 1)==1{

NearbyShare/NearbyConnection.swift

@@ -319,6 +319,31 @@ class NearbyConnection{
 		return String(format: "%04d", abs(hash))
 	}
 	
+	internal static func hkdfExtract(salt:Data, ikm:Data) -> Data{
+		return HMAC<SHA256>.authenticationCode(for: ikm, using: SymmetricKey(data: salt)).withUnsafeBytes({return Data(bytes: $0.baseAddress!, count: $0.count)})
+	}
+	
+	internal static func hkdfExpand(prk:Data, info:Data, length:Int) -> Data{
+		var okm=Data()
+		var t=Data()
+		var i=0
+		while okm.count<length{
+			i=i+1
+			let toDigest=t+info+Data([UInt8(truncatingIfNeeded: i)])
+			t=HMAC<SHA256>.authenticationCode(for: toDigest, using: SymmetricKey(data: prk)).withUnsafeBytes({return Data(bytes: $0.baseAddress!, count: $0.count)})
+			okm=okm+t
+		}
+		return okm.subdata(in: 0..<length)
+	}
+	
+	internal static func hkdf(inputKeyMaterial:SymmetricKey, salt:Data, info:Data, outputByteCount:Int) -> SymmetricKey{
+		if #available(macOS 11.0, *){
+			return HKDF<SHA256>.deriveKey(inputKeyMaterial: inputKeyMaterial, salt: salt, info: info, outputByteCount: outputByteCount)
+		}else{
+			return SymmetricKey(data: hkdfExpand(prk: hkdfExtract(salt: salt, ikm: inputKeyMaterial.withUnsafeBytes({return Data(bytes: $0.baseAddress!, count: $0.count)})), info: info, length: outputByteCount))
+		}
+	}
+	
 	internal func finalizeKeyExchange(peerKey:Securemessage_GenericPublicKey) throws{
 		guard peerKey.hasEcP256PublicKey else { throw NearbyError.requiredFieldMissing("peerKey.ecP256PublicKey") }
 		
@@ -341,8 +366,8 @@ class NearbyConnection{
 		var ukeyInfo=Data()
 		ukeyInfo.append(ukeyClientInitMsgData!)
 		ukeyInfo.append(ukeyServerInitMsgData!)
-		let authString=HKDF<SHA256>.deriveKey(inputKeyMaterial: SymmetricKey(data: derivedSecretKey), salt: "UKEY2 v1 auth".data(using: .utf8)!, info: ukeyInfo, outputByteCount: 32)
+		let authString=NearbyConnection.hkdf(inputKeyMaterial: SymmetricKey(data: derivedSecretKey), salt: "UKEY2 v1 auth".data(using: .utf8)!, info: ukeyInfo, outputByteCount: 32)
-		let nextSecret=HKDF<SHA256>.deriveKey(inputKeyMaterial: SymmetricKey(data: derivedSecretKey), salt: "UKEY2 v1 next".data(using: .utf8)!, info: ukeyInfo, outputByteCount: 32)
+		let nextSecret=NearbyConnection.hkdf(inputKeyMaterial: SymmetricKey(data: derivedSecretKey), salt: "UKEY2 v1 next".data(using: .utf8)!, info: ukeyInfo, outputByteCount: 32)
 		
 		pinCode=NearbyConnection.pinCodeFromAuthKey(authString)
 		
@@ -350,17 +375,17 @@ class NearbyConnection{
 							0xEE, 0x8D, 0x39, 0x09, 0xB9, 0x5F, 0x13, 0xFA, 0x7D, 0xEB, 0x1D,
 							0x4A, 0xB3, 0x83, 0x76, 0xB8, 0x25, 0x6D, 0xA8, 0x55, 0x10])
 		
-		let d2dClientKey=HKDF<SHA256>.deriveKey(inputKeyMaterial: nextSecret, salt: salt, info: "client".data(using: .utf8)!, outputByteCount: 32)
+		let d2dClientKey=NearbyConnection.hkdf(inputKeyMaterial: nextSecret, salt: salt, info: "client".data(using: .utf8)!, outputByteCount: 32)
-		let d2dServerKey=HKDF<SHA256>.deriveKey(inputKeyMaterial: nextSecret, salt: salt, info: "server".data(using: .utf8)!, outputByteCount: 32)
+		let d2dServerKey=NearbyConnection.hkdf(inputKeyMaterial: nextSecret, salt: salt, info: "server".data(using: .utf8)!, outputByteCount: 32)
 		
 		sha=SHA256()
 		sha.update(data: "SecureMessage".data(using: .utf8)!)
 		let smsgSalt=Data(sha.finalize())
 		
-		let clientKey=HKDF<SHA256>.deriveKey(inputKeyMaterial: d2dClientKey, salt: smsgSalt, info: "ENC:2".data(using: .utf8)!, outputByteCount: 32).withUnsafeBytes({return [UInt8]($0)})
+		let clientKey=NearbyConnection.hkdf(inputKeyMaterial: d2dClientKey, salt: smsgSalt, info: "ENC:2".data(using: .utf8)!, outputByteCount: 32).withUnsafeBytes({return [UInt8]($0)})
-		let clientHmacKey=HKDF<SHA256>.deriveKey(inputKeyMaterial: d2dClientKey, salt: smsgSalt, info: "SIG:1".data(using: .utf8)!, outputByteCount: 32)
+		let clientHmacKey=NearbyConnection.hkdf(inputKeyMaterial: d2dClientKey, salt: smsgSalt, info: "SIG:1".data(using: .utf8)!, outputByteCount: 32)
-		let serverKey=HKDF<SHA256>.deriveKey(inputKeyMaterial: d2dServerKey, salt: smsgSalt, info: "ENC:2".data(using: .utf8)!, outputByteCount: 32).withUnsafeBytes({return [UInt8]($0)})
+		let serverKey=NearbyConnection.hkdf(inputKeyMaterial: d2dServerKey, salt: smsgSalt, info: "ENC:2".data(using: .utf8)!, outputByteCount: 32).withUnsafeBytes({return [UInt8]($0)})
-		let serverHmacKey=HKDF<SHA256>.deriveKey(inputKeyMaterial: d2dServerKey, salt: smsgSalt, info: "SIG:1".data(using: .utf8)!, outputByteCount: 32)
+		let serverHmacKey=NearbyConnection.hkdf(inputKeyMaterial: d2dServerKey, salt: smsgSalt, info: "SIG:1".data(using: .utf8)!, outputByteCount: 32)
 		
 		if isServer(){
 			decryptKey=clientKey

NearbyShare/NearbyConnectionManager.swift

@@ -53,7 +53,7 @@ public enum NearbyError:Error{
 	case protocolError(_ message:String)
 	case requiredFieldMissing(_ message:String)
 	case ukey2
-	case inputOutput(cause:Errno)
+	case inputOutput
 	case canceled(reason:CancellationReason)
 	
 	public enum CancellationReason{

NearbyShare/OutboundNearbyConnection.swift

@@ -277,10 +277,16 @@ class OutboundNearbyConnection:NearbyConnection{
 				let typeID=try? url.resourceValues(forKeys: [.typeIdentifierKey]).typeIdentifier
 				meta.mimeType="application/octet-stream"
 				if let typeID=typeID{
+					if #available(macOS 11.0, *){
 						let type=UTType(typeID)
 						if let type=type, let mimeType=type.preferredMIMEType{
 							meta.mimeType=mimeType
 						}
+					}else{
+						if let mimeType=UTTypeCopyPreferredTagWithClass(typeID as CFString, kUTTagClassMIMEType){
+							meta.mimeType=(mimeType.takeRetainedValue() as NSString) as String
+						}
+					}
 				}
 				if meta.mimeType.starts(with: "image/"){
 					meta.type = .image
@@ -358,8 +364,14 @@ class OutboundNearbyConnection:NearbyConnection{
 			currentTransfer=queue.removeFirst()
 		}
 		
-		guard let fileBuffer=try currentTransfer!.handle!.read(upToCount: 512*1024) else{
+		let fileBuffer:Data
-			throw NearbyError.inputOutput(cause: Errno.ioError)
+		if #available(macOS 10.15.4, *) {
+			guard let _fileBuffer=try currentTransfer!.handle!.read(upToCount: 512*1024) else{
+				throw NearbyError.inputOutput
+			}
+			fileBuffer=_fileBuffer
+		} else {
+			fileBuffer=currentTransfer!.handle!.readData(ofLength: 512*1024)
 		}
 		
 		var transfer=Location_Nearby_Connections_PayloadTransferFrame()

ShareExtension/Base.lproj/ShareViewController.xib

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="21701" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
+<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="22505" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
     <dependencies>
         <deployment identifier="macosx"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="21701"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="22505"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <objects>
@@ -32,9 +32,6 @@
             <subviews>
                 <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="NVE-vN-dkz">
                     <rect key="frame" x="325" y="3" width="76" height="32"/>
-                    <constraints>
-                        <constraint firstAttribute="width" relation="greaterThanOrEqual" constant="60" id="cP1-hK-9ZX"/>
-                    </constraints>
                     <buttonCell key="cell" type="push" title="Cancel" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="6Up-t3-mwm">
                         <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                         <font key="font" metaFont="system"/>
@@ -42,6 +39,9 @@
 Gw
 </string>
                     </buttonCell>
+                    <constraints>
+                        <constraint firstAttribute="width" relation="greaterThanOrEqual" constant="60" id="cP1-hK-9ZX"/>
+                    </constraints>
                     <connections>
                         <action selector="cancel:" target="-2" id="Qav-AK-DGt"/>
                     </connections>
@@ -57,7 +57,7 @@ Gw
                             </constraints>
                             <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageScaling="proportionallyDown" image="NearDropIcon" id="q3u-Am-ZIA"/>
                         </imageView>
-                        <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="aNc-0i-CWK">
+                        <textField focusRingType="none" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="aNc-0i-CWK">
                             <rect key="frame" x="19" y="0.0" width="67" height="16"/>
                             <textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" alignment="left" title="NearDrop" allowsEditingTextAttributes="YES" id="0xp-rC-2gr">
                                 <font key="font" metaFont="systemBold"/>
@@ -83,7 +83,7 @@ Gw
                     </constraints>
                     <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageScaling="proportionallyDown" id="jOq-9r-V1W"/>
                 </imageView>
-                <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" setsMaxLayoutWidthAtFirstLayout="YES" translatesAutoresizingMaskIntoConstraints="NO" id="OEz-QK-nem">
+                <textField focusRingType="none" horizontalHuggingPriority="251" verticalHuggingPriority="750" setsMaxLayoutWidthAtFirstLayout="YES" translatesAutoresizingMaskIntoConstraints="NO" id="OEz-QK-nem">
                     <rect key="frame" x="29" y="196" width="367" height="16"/>
                     <textFieldCell key="cell" lineBreakMode="truncatingMiddle" truncatesLastVisibleLine="YES" id="opy-Bj-x6u">
                         <font key="font" metaFont="system"/>
@@ -116,10 +116,10 @@ Gw
             <rect key="frame" x="0.0" y="0.0" width="521" height="100"/>
             <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
             <subviews>
-                <progressIndicator maxValue="100" indeterminate="YES" style="spinning" translatesAutoresizingMaskIntoConstraints="NO" id="fCj-wF-rEj">
+                <progressIndicator wantsLayer="YES" maxValue="100" indeterminate="YES" style="spinning" translatesAutoresizingMaskIntoConstraints="NO" id="fCj-wF-rEj">
                     <rect key="frame" x="245" y="68" width="32" height="32"/>
                 </progressIndicator>
-                <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="27P-yf-gUd">
+                <textField wantsLayer="YES" focusRingType="none" horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="27P-yf-gUd">
                     <rect key="frame" x="189" y="42" width="144" height="16"/>
                     <textFieldCell key="cell" lineBreakMode="clipping" title="Looking for devices..." id="NaJ-Wx-Pim">
                         <font key="font" textStyle="headline" name=".SFNS-Bold"/>
@@ -127,7 +127,7 @@ Gw
                         <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
                     </textFieldCell>
                 </textField>
-                <textField verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" translatesAutoresizingMaskIntoConstraints="NO" id="V5W-Rm-YVM">
+                <textField wantsLayer="YES" focusRingType="none" verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" translatesAutoresizingMaskIntoConstraints="NO" id="V5W-Rm-YVM">
                     <rect key="frame" x="-2" y="0.0" width="525" height="32"/>
                     <textFieldCell key="cell" alignment="center" title="If you don't see your device, open &quot;Google Files&quot; app and tap &quot;Receive&quot; on the Nearby Share tab." id="vla-gF-eJo">
                         <font key="font" metaFont="system"/>
@@ -185,7 +185,7 @@ Gw
                         <constraint firstAttribute="bottom" secondItem="84U-lB-SRB" secondAttribute="bottom" id="uh8-T1-Vd8"/>
                     </constraints>
                 </customView>
-                <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" setsMaxLayoutWidthAtFirstLayout="YES" translatesAutoresizingMaskIntoConstraints="NO" id="dJc-gw-4ux">
+                <textField focusRingType="none" horizontalHuggingPriority="251" verticalHuggingPriority="750" setsMaxLayoutWidthAtFirstLayout="YES" translatesAutoresizingMaskIntoConstraints="NO" id="dJc-gw-4ux">
                     <rect key="frame" x="-2" y="56" width="388" height="16"/>
                     <textFieldCell key="cell" lineBreakMode="truncatingTail" alignment="center" id="QzI-qQ-OBb">
                         <font key="font" metaFont="system"/>
@@ -199,7 +199,7 @@ Gw
                         <constraint firstAttribute="width" constant="200" id="bM2-Ih-2UC"/>
                     </constraints>
                 </progressIndicator>
-                <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="y8I-D3-scQ">
+                <textField focusRingType="none" horizontalHuggingPriority="251" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="y8I-D3-scQ">
                     <rect key="frame" x="165" y="0.0" width="54" height="16"/>
                     <textFieldCell key="cell" lineBreakMode="clipping" id="Iin-UY-IE5">
                         <font key="font" metaFont="system"/>

ShareExtension/ShareViewController.swift

@@ -44,7 +44,8 @@ class ShareViewController: NSViewController, ShareExtensionDelegate{
 			for attachment in attachments as NSArray{
 				let provider=attachment as! NSItemProvider
 				provider.loadItem(forTypeIdentifier: kUTTypeURL as String) { data, err in
-					if let url=URL(dataRepresentation: data as! Data, relativeTo: nil, isAbsolute: false){
+					if let urlData=data as? Data{
+						if let url=URL(dataRepresentation: urlData, relativeTo: nil, isAbsolute: false){
 							self.urls.append(url)
 							if self.urls.count==attachments.count{
 								DispatchQueue.main.async {
@@ -52,6 +53,14 @@ class ShareViewController: NSViewController, ShareExtensionDelegate{
 								}
 							}
 						}
+					}else if let url=data as? NSURL{
+						self.urls.append(url as URL)
+						if self.urls.count==attachments.count{
+							DispatchQueue.main.async {
+								self.urlsReady()
+							}
+						}
+					}
 				}
 			}
 		} else {