Throwing windows to other spaces fails on macOS 15 beta 1

[FelixLisczyk]

Describe the bug
The keyboard shortcuts to throw windows to other spaces don't work in the first beta release of macOS 15.

Applications
Amethyst and Safari. The problem applies to other apps as well.

To Reproduce

1. Launch Amethyst on macOS 15 beta.
2. Trigger a keyboard shortcut that throws the active window to another space.

Expected behavior
The window moves to the new space.

Actual behavior
The window flickers for a moment but stays in the current space.

Versions

• macOS: 15.0 Beta (24A5264n)
• Amethyst: 0.21.1 (111)

Log Messages
The following log messages appear in the Xcode 16.0 beta console (I've checked out the development branch):

14:49:28.723 💚 DEBUG ScreenManager.setNeedsReflow():177 - Screen: 99CDF38A-8253-433F-A741-B3538F7C6E6E -- Window Change: remove(window: <Amethyst.AXWindow: 0x6000005ff440> <Title: Amethyst — Amethyst.xcworkspace> <pid: 12593>)
14:49:28.723 ❤️ ERROR Window.move():388 - failed to set compat aside id: CGError(rawValue: 717863)
14:49:28.762 💚 DEBUG ScreenManager.setNeedsReflow():177 - Screen: 99CDF38A-8253-433F-A741-B3538F7C6E6E -- Window Change: add(window: <Amethyst.AXWindow: 0x6000005ff440> <Title: Amethyst — Amethyst.xcworkspace> <pid: 12593>)
14:49:28.996 💚 DEBUG ScreenManager.setNeedsReflow():177 - Screen: 99CDF38A-8253-433F-A741-B3538F7C6E6E -- Window Change: applicationActivate

[swibrow]

I have this issue on 14.5

[ianyh]

This was (partly) fixed in 0.21.1 for macOS 14.5, but macOS 15 might be the actual nail in the coffin for moving windows between spaces.

[mischavandenburg]

I'm having the same issue on 14.5.

Does this mean this won't be possible anymore from here on out?

[ianyh]

The mechanism by which we do it is no longer possible, it seems. Until someone figures out a different way (which may very well not be possible, particularly with SIP enabled), then we are out of luck. I don't really have the bandwidth to do that kind of diving, but I'm going to keep my eye on it to see if anything changes (on the open source end or the Apple end).