FYI - If you've moved to the latest #MacOS Golden Gate 27.0 and your #EmacsForMac version is playing up, set: export MACOSX_DEPLOYMENT_TARGET=15.0 It's to do with the embedded libgccjit in the Emacs.app and Apple's inability to get version numbering consistent. 🤦🏻‍♂️ #Emacs