Gatekeeper enforces Library Validation and prevents `dlopen` of quarantined ad-hoc signed dynamic libraries on ARM64. Because the `_internal` folder was shipped inside the DMG, the user's system flagged it with the com.apple.quarantine attribute, causing the Python shared library to fail to load inside `yt-dlp`.
By reverting back to the single-file PyInstaller binary (which is now properly code-signable without corruption on macOS), PyInstaller extracts the `_internal` folder at runtime to `/var/folders/...`. These extracted files do not inherit the quarantine flag, allowing AMFI to successfully load them and completely bypassing the dlopen system policy rejection.
- core: remove DispatchGroup from MediaExtractionEngine to fix hanging on yt-dlp launch failure
- core: clear readabilityHandlers in Aria2DownloadEngine if process fails to launch
- core: fix TOCTOU type warning for findFreePort
- build: fix inverted logic in Mach-O validation script
- ci: fix hardcoded macOS SDK version check in release workflow
- ci: prevent workflow_dispatch from failing on verify-tag
NimBold