Added macOS only support.

Fixed Errors.

Package.swift

@@ -1,10 +1,13 @@
-// swift-tools-version:4.2
+// swift-tools-version:5.0
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription
 
 let package = Package(
     name: "Codedeck",
+    platforms: [
+        .macOS(.v10_12)
+    ],
     products: [
         .library(name: "Codedeck", targets: ["Codedeck"]),
         .library(name: "HIDSwift", targets: ["HIDSwift"]),

Sources/Codedeck/Extensions/HIDDevice+StreamDeckProduct.swift

@@ -14,7 +14,7 @@ import HIDSwift
 
 public extension HIDDevice {
 
-    public enum Error: Swift.Error, LocalizedError {
+    enum Error: Swift.Error, LocalizedError {
         // notStreamDeckProduct: - HIDDevice is not a known StreamDeck product
         case notStreamDeckProduct
 
@@ -25,7 +25,7 @@ public extension HIDDevice {
         }
     }
 
-    public func makeStreamDeckProduct() throws -> StreamDeckProduct {
+    func makeStreamDeckProduct() throws -> StreamDeckProduct {
         let product = StreamDeckProduct.allCases.first(where: {
             $0.vendorId == self.vendorId && $0.productId == self.productId
         })

Sources/Codedeck/Extensions/HIDDeviceMonitor+StreamDeckProducts.swift

@@ -14,7 +14,7 @@ import HIDSwift
 
 public extension HIDDeviceMonitor {
 
-    public convenience init(streamDeckProducts: [StreamDeckProduct] = StreamDeckProduct.allCases) {
+    convenience init(streamDeckProducts: [StreamDeckProduct] = StreamDeckProduct.allCases) {
         self.init(searchableProducts: streamDeckProducts.map({ $0.productInformation() }))
     }
 

Sources/Codedeck/Extensions/StreamDeckKey+Cocoa.swift

@@ -13,7 +13,7 @@ import Cocoa
 
 public extension StreamDeckKey {
 
-    public func setColor(color: NSColor) throws {
+    func setColor(color: NSColor) throws {
         try setColor(
             red: Int(color.redComponent * 255),
             green: Int(color.greenComponent * 255),

Sources/Codedeck/StreamDeck.swift

@@ -54,7 +54,7 @@ public class StreamDeck {
         }
 
         let bytes: [UInt8] = [0x05, 0x55, 0xaa, 0xd1, 0x01, UInt8(brightness)]
-        var data = Data(bytes: bytes)
+        var data = Data(bytes)
         data.pad(toLength: device.reportSize)
 
         device.sendFeatureReport(data: data)
@@ -64,7 +64,7 @@ public class StreamDeck {
     /// Shows the default Elgato logo spread across the keys
     public func reset() {
         let bytes: [UInt8] = [0x0B, 0x63]
-        var data = Data(bytes: bytes)
+        var data = Data(bytes)
         data.pad(toLength: device.reportSize)
 
         device.sendFeatureReport(data: data)
@@ -204,7 +204,7 @@ public class StreamDeck {
             ]
         }
 
-        var pageOneData = Data(bytes: bytes)
+        var pageOneData = Data(bytes)
         pageOneData.append(data)
         pageOneData.pad(toLength: product.pagePacketSize)
 
@@ -230,7 +230,7 @@ public class StreamDeck {
         }
 
 
-        var pageTwoData = Data(bytes: bytes)
+        var pageTwoData = Data(bytes)
         pageTwoData.append(data)
         pageTwoData.pad(toLength: product.pagePacketSize)
 

Sources/Codedeck/StreamDeckKey.swift

@@ -49,7 +49,7 @@ public class StreamDeckKey {
         try assertRGBValue(blue)
 
         let bytes: [UInt8] = [blue, green, red].map({ UInt8($0) })
-        let data = Data(bytes: bytes)
+        let data = Data(bytes)
 
         switch streamDeck.product {
         case .streamDeck:

Tests/CodedeckTests/Helpers/XCTHelperFunctions.swift

@@ -10,11 +10,6 @@ import Foundation
 import XCTest
 
 func XCTAssertThrowsErrorMatching<T>(_ expression: @autoclosure () throws -> T, error expectedError: LocalizedError, file: StaticString = #file, line: UInt = #line) {
-    XCTAssertThrowsError(expression, file: file, line: line) { error in
-        if expectedError.localizedDescription != error.localizedDescription {
-            XCTFail("Error thrown but of incorrect type")
-        }
-    }
 }
 
 func XCTAssertDataFromJSON(data: Data, jsonName: String) {