CI: Update macOS workflows to macOS 15 runners with Xcode 16.1 #11624
+39
−18
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Description
Updates macOS-based jobs to use macOS 15 runners and switch to Xcode 16.1 as development environment.
Motivation and Context
Using any feature introduced in macOS 15 requires compiling OBS Studio with Xcode 16+, which is only available on macOS 15 runners. Otherwise new features of the content sharing picker or audio sinks cannot be compiled on CI.
How Has This Been Tested?
Requires test runs on CI itself.
Types of changes
Checklist: