I've filed a FB already through standard channels (FB ID: FB19032008) but I'll post it here in case it may get some attention from others experiencing similar issues. On macOS 26 Beta 5 and Xcode 26 Beta 5 (and earlier revisions afaik) Icon Composer specifies a minimum window size that greatly exceeds the bounds of the 1280x800/832pt video modes available on 13in MacBooks, and which also is too large for the default 1440x900 video mode on non-notched 13in MacBook Air/Pro models as this causes a default-size 64pt dock to occlude the window. I've attached screenshots depicting this behaviour in the two above described cases. Best solution seems like reducing min window size to something that will fit reasonably in a 1280x800pt viewport including the dock and menu bar (e.g. 1000x600 or something).
Icon Composer's minimum window size is too big for smaller MacBook video modes
Any thoughts/updates on this from an Apple engineer working on Xcode & Icon Composer would be appreciated.
It's been improved significantly in the latest Xcode 26 beta it seems, it’s perfectly usable and well-sized on 900p modes and even at 1280x800 fits entirely on-screen albeit barely, as it does occlude the dock still. It would be perfect if the minimum vertical height could be shrunken even a tad bit more, by say 64pt, then it’d be usable on all reasonable Mac video modes.