My solution to a similar problem. That is, MySQL did a great job with the MAMP manager utility. The Apache server did not, and the "Open Start Page" was gray, i.e. Did not work.
It seems that my problem was that the Apache server was not for one reason or another able to access the apache_error.log log file in the / Applications / MAMP / logs folder. The file is somehow "stuck", that is, I could not change the file permissions using the chmod command. Only after I completely deleted the log file and then restarted the MAMP management utility and started working with MySQL and Apache again, everything worked fine.
BR, Janne
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