diff --git a/macOS/AppDelegate.swift b/macOS/AppDelegate.swift
index b44a890..f23d06e 100644
--- a/macOS/AppDelegate.swift
+++ b/macOS/AppDelegate.swift
@@ -2,12 +2,23 @@ import Cocoa
 import Sparkle
 
 class AppDelegate: NSObject, NSApplicationDelegate {
-    func applicationDidFinishLaunching(_ notification: Notification) {
-        SUUpdater.shared()?.automaticallyChecksForUpdates = true
-        /*
-         Next line prints:
-         ⚠️ You must specify the URL of the appcast as the SUFeedURL key in either the Info.plist or the user defaults!
-         */
-        SUUpdater.shared()?.checkForUpdates(self)
+    func applicationWillFinishLaunching(_ notification: Notification) {
+        // Check UserDefaults for values; if the key doesn't exist (e.g., if MacUpdatesView hasn't ever been shown),
+        // bool(forKey:) returns false, so set SUUpdater.shared() appropriately.
+        let automaticallyChecksForUpdates = UserDefaults.standard.bool(forKey: "automaticallyChecksForUpdates")
+        let subscribeToBetaUpdates = UserDefaults.standard.bool(forKey: "subscribeToBetaUpdates")
+
+        // Set Sparkle properties.
+        SUUpdater.shared()?.automaticallyChecksForUpdates = automaticallyChecksForUpdates
+        if subscribeToBetaUpdates {
+            SUUpdater.shared()?.feedURL = URL(string: AppcastFeedUrl.beta.rawValue)
+        } else {
+            SUUpdater.shared()?.feedURL = URL(string: AppcastFeedUrl.release.rawValue)
+        }
+
+        // If enabled, check for updates.
+        if automaticallyChecksForUpdates {
+            SUUpdater.shared()?.checkForUpdates(self)
+        }
     }
 }
diff --git a/macOS/Settings/MacUpdatesView.swift b/macOS/Settings/MacUpdatesView.swift
index deee83b..c72f488 100644
--- a/macOS/Settings/MacUpdatesView.swift
+++ b/macOS/Settings/MacUpdatesView.swift
@@ -1,7 +1,7 @@
 import SwiftUI
 import Sparkle
 
-private enum AppcastFeedUrl: String {
+enum AppcastFeedUrl: String {
     case release = "https://files.writefreely.org/apps/mac/appcast.xml"
     case beta = "https://files.writefreely.org/apps/mac/appcast-beta.xml"
 }