I am new to MAMP and made a fresh installation of the free version on my MAC. I installed a typo3 Website there, using MySQL and PHP 7.3.9.
In general it works, but every few clicks in the Backend of Typo3 as well as in the Frontend Website Firefox display an error:
I changed the default http Port from 8888 to 80 and edited the php.ini from 7.3.9, but nothing special changed tehere. Only max_exec_time and similar things were set to a higher value as I use it on my Webserver.
Thank you in advance, Vincent