Method 1

Change 'Cache module to speed up execution' from 'OPcache' to 'off'.

Method 2

nano /Applications/MAMP/bin/php/phpx.x.x/conf/php.ini

enable=0

Method 3

nano /Applications/MAMP/bin/php/phpx.x.x/conf/php.ini

opcache.revalidate_freq=0

Method 4

opcache_reset();