Accessing mysql from the command line will cause MAMP's UI to crash; I get the "Application Not Responding" error. Apache, PHP, and MySQL are still running, it's just the UI that crashes.
The 2 main commands I run are mysql (import), and mysqldump. The database import sizes range from 5MB to 350MB.
Would adjusting any of the settings in my.cnf help? Maybe add more RAM to max_allowed_packet?
System: macOS 10.15.x and MAMP Pro 5.5.1.