I just can stop and so test nothing...
If your Lazarus has a Run | Run without Debugging menu item, try that. That should allow you to run the compiled app even though the debugger isn't working.
For running WITH debugging, you have two choices, I suppose. Since your problem has been reported here many times, you could read through the various posts and suggestions for how to get gdb running on Mac. Sometimes people succeed, sometimes they don't.
Or you could just create an Xcode project for your Lazarus project and debug your app in Xcode. Then you'll be using the lldb debugger that's included with Xcode. Here's how:
https://macpgmr.github.io/ObjP/ProjectXC.html