Cannot take screenshots via lua API on macOS

[MortenLohne]

Version: 0.10.4, installed via the macOS "modern installer".
OS: M1 mac, running macOS 15.2.
Problem: Running emu:screeenshot("test.png") in the lua scripting API appears to silently fail. The function call returns nil, and no error appears in the emulator's logs, but no screenshot is saved anywhere. I expected the screenshot to be saved in the directory where the emulator is located.

Maybe I'm missing something obvious here, but I've used the screenshot API successfully on Ubuntu Linux, so I feel like my usage is fundamentally sound.

Taking a regular screenshot (By pressing f12) works as expected.