You cannot use the screensaver with this version of OS X

Question

So here's my current problem. I'm attempting to create a screensaver, all I'm doing is setting a background color like so,

public override func drawRect(rect: NSRect) {

    super.drawRect(rect)

    let color = NSColor(red:0.33, green:0.78, blue:0.99, alpha:1)

    color.setFill()
    NSBezierPath.fillRect(rect)

}

Fairly straight forward. I also set EMBEDDED_CONTENT_CONTAINS_SWIFT = YES;

Now when I go to install the .saver file I am returned with a message that says

You cannot use the screensaver X with this version of OS X

Any ideas?

Answer 1

If you're on Mojave, then the Principal class needs to include the module name (target name) as well:

<key>NSPrincipalClass</key>
<string>[YourTarget].[YourClass]</string>

You might also need to set Always Embed Swift Standard Libraries to YES in your Build Settings as well as check the Principle Class as above.

Sources:

https://github.com/JohnCoates/Aerial/issues/464 https://blog.viacom.tech/2016/06/27/making-a-macos-screen-saver-in-swift-with-scenekit/