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fixed the issue where <10.10 systems would crash when trying to share their screen (or anything like that) due to an exception, as the nsstatusitem class does not have the 'button' member on <10.10 systems: https://developer.apple.com/documentation/appkit/nsstatusitem/1535056-button
edit (5 october 2024): fix the checkbox/radiobox and button focus rendering, which were obvious when you ran the profilemanager. also fix the video playback issues. all of these have been tested and fixed.
10.7 still needs a bit of work, the tab contents are causing issues where the page frame will show a spinning icon but you can still create tabs.
-something weird is going on. could be the kernel needing more changes, not sure.
definitely looks almost-there though, thanks to @mstange. still have to figure out the pocket popup not showing and the sharp corners on the edge of the window frame.