March 9, 2018, 10:50 pm
1. Quit MAMP.
2. In the finder go to Applications/MAMP/db/mysql/
3. Delete the last log file ib_logfile0 and ib_logfile1 we can see in below image.
4. Mysql server on MAMP won't start [It was dissolved]
5. Please back up these before you delete them.
6. Restart MAMP.
It Worked for me.