I updated my OSX to the latest version, OSX Yosemite Beta 2 early today. Then I encountered an error on my MAMP. Apache Server Won’t Start.
After lot of google-ing, this is how i solve this problem.
You apparently have to go to your MAMP folder in Applications. Go to bin -> apache2 -> bin:
Then change envvars to _envvars.
Finally, open MAMP client and try to start Apache server and Mysql server again. Both of the services should able to start now.