now uses correct seed catalog URL for current OS

Author: scriptingosx

FetchInstallerPkg.xcodeproj/project.pbxproj

@@ -373,7 +373,7 @@
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 26;
+				CURRENT_PROJECT_VERSION = 27;
 				DEVELOPMENT_ASSET_PATHS = "\"FetchInstallerPkg/Preview Content\"";
 				DEVELOPMENT_TEAM = JME5BW3F3R;
 				ENABLE_APP_SANDBOX = YES;
@@ -409,7 +409,7 @@
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 26;
+				CURRENT_PROJECT_VERSION = 27;
 				DEVELOPMENT_ASSET_PATHS = "\"FetchInstallerPkg/Preview Content\"";
 				DEVELOPMENT_TEAM = JME5BW3F3R;
 				ENABLE_APP_SANDBOX = YES;

FetchInstallerPkg/Model/SeedProgram.swift

@@ -7,8 +7,10 @@
 
 import Foundation
 
-// Note: this will be different for Monterey
-let defaultCatalog = "https://swscan.apple.com/content/catalogs/others/index-11-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog"
+let suCatalogs = [
+    11: "https://swscan.apple.com/content/catalogs/others/index-11-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog",
+    12: "https://swscan.apple.com/content/catalogs/others/index-12-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog"
+]
 
 enum SeedProgram: String, CaseIterable, Identifiable {
     case customerSeed = "CustomerSeed"
@@ -18,11 +20,26 @@ enum SeedProgram: String, CaseIterable, Identifiable {
 
     var id: String {self.rawValue}
 }
+
+// return the default catalog URL for the current version of macOS
+func defaultCatalog() -> URL? {
+    let majorVersion = ProcessInfo.processInfo.operatingSystemVersion.majorVersion
+    
+    var catalog = ""
+    switch majorVersion {
+    case 11:
+        catalog = "https://swscan.apple.com/content/catalogs/others/index-11-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog"
+    default:
+        catalog = "https://swscan.apple.com/content/catalogs/others/index-12-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog"
+    }
 
+    return URL(string: catalog)
+}
+
 func catalogURL(for seed: SeedProgram) -> URL {
     let seedPath = "/System/Library/PrivateFrameworks/Seeding.framework/Resources/SeedCatalogs.plist"
 
-    var catalogURL = URL(string: defaultCatalog)!
+    var catalogURL = defaultCatalog()!
 
     let seedPathURL = URL(fileURLWithPath: seedPath)
     // read plist file