Somebody deserves to know this: JetBrains CLion comes with a compiled gdb 14.2 binary for aarch64.. and it works. So one can download CLion, point at the gdb executable in the CLion.app bundle (at /Applications/CLion.app/Contents/bin/gdb/mac/aarch64/bin/gdb) and you're off at the races. No idea why a commercial company has a working gdb build but the open source community doesn't but here we are in October 2024.