Summary: RStudio Desktop crashes on launch on M2 macOS Sequoia 15.6.1 (24G90).
RStudio builds tried: 2025.05.1+513 (current), also 2024.12.1+563 — both crash/bounce.
macOS: 15.6.1 (24G90), MacBook Pro M2 Pro (arm64).
R: /Library/Frameworks/R.framework/Resources/bin/R , arch aarch64 (verified with cat(R.version$arch) ), R outside RStudio works.
What happens: Dock icon bounces, a window frame/title bar flashes, then app quits.
Crash excerpt: EXC_BREAKPOINT (SIGTRAP) in Electron Framework → multiple v8::internal::compiler::… frames; many frames labeled ares_llist_replace_destructor (Electron symbolization).
Electron in app: 34.5.1 (from crash binary images).
Steps already tried:
– Removed quarantine: sudo xattr -dr com.apple.quarantine /Applications/RStudio.app
– Full user-state reset: deleted ~/.local/share/rstudio , ~/.config/rstudio , ~/.rstudio-desktop , ~/Library/Application Support/RStudio , ~/Library/Caches/com.rstudio.desktop , ~/Library/Logs/RStudio , saved-state.
– Launched with GPU off and Skia disabled: --disable-gpu --disable-features=UseSkiaRenderer,CanvasOopRasterization,Accelerated2dCanvas (via RSTUDIO_CHROMIUM_ARGUMENTS and via --args ).
– Set ELECTRON_OZONE_PLATFORM_HINT=cocoa , LANG/LC_ALL=en_AU.UTF-8 .
– Also attempted --user-data-dir to a fresh temp profile.
Result: still crashes at startup with the above SIGTRAP.
(If I try Fix A/B from this ticket): note whether font-cache reset and --js-flags=--jitless change behavior.
Related context: Similar Electron/V8 startup crashes on macOS 15.x reported upstream (example Electron issue for Sequoia/V8 startup crash).