[AltServer] Fetches anisette data without Mail plug-in

Works on all macOS versions supported by AltServer.

AltServer/Extensions/ProcessInfo+Device.swift

@@ -0,0 +1,54 @@
+//
+//  ProcessInfo+Device.swift
+//  AltServer
+//
+//  Created by Riley Testut on 9/13/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import Foundation
+import RegexBuilder
+
+extension ProcessInfo
+{
+    var deviceModel: String? {
+        let service = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice"))
+        defer {
+            IOObjectRelease(service)
+        }
+        
+        guard 
+            let modelData = IORegistryEntryCreateCFProperty(service, "model" as CFString, kCFAllocatorDefault, 0).takeRetainedValue() as? Data,
+            let cDeviceModel = String(data: modelData, encoding: .utf8)?.cString(using: .utf8) // Remove trailing NULL character
+        else { return nil }
+        
+        let deviceModel = String(cString: cDeviceModel)
+        return deviceModel
+    }
+    
+    var operatingSystemBuildVersion: String? {
+        let osVersionString = ProcessInfo.processInfo.operatingSystemVersionString
+        let buildVersion: String?
+        
+        if #available(macOS 13, *), let match = osVersionString.firstMatch(of: Regex {
+            "(Build "
+            Capture {
+                OneOrMore(.anyNonNewline)
+            }
+            ")"
+        })
+        {
+            buildVersion = String(match.1)
+        }
+        else if let build = osVersionString.split(separator: " ").last?.dropLast()
+        {
+            buildVersion = String(build)
+        }
+        else
+        {
+            buildVersion = nil
+        }
+        
+        return buildVersion
+    }
+}