No close button on Mac in maximised

Hi @Sam30334183g2pe testing here with the same settings you mention but with the latest Ps beta: Adobe Photoshop Version: 25.11.0 20240623.m.2675 16df996 arm64 and we do not see this issue.

Please update your Ps beta and see if this issue persists. If it does, try resetting your prefs:

Try resetting Prefs for the Beta:
/Users/yourname/Library/Preferences/ Photoshop Beta Settings (Mac Ventura)
/Users/yourname/Library/Preferences/Adobe\ Photoshop\ \(Beta\)\ Settings (Mac)


C:\Users\user name\AppData\Roaming\Adobe\Adobe Photoshop (Beta)\Adobe Photoshop (Beta) Settings

Launch BETA Photoshop While Pressing The Keyboard Shortcut
With Photoshop closed, press and hold Shift+Ctrl+Alt (Win) / Shift+Command+Option (Mac) on your keyboard and then Launch Photoshop the way you normally would.
https://helpx.adobe.com/photoshop/using/preferences.html#Manually 

Thanks,

Cory - Photoshop Product Manager