To make sure your local environment is truly running 8.1, create a test file. Go to your htdocs folder. Create a file named info.php . Inside the file, type: .
Once you have the PHP 8.1 folder, you need to place it where MAMP can see it. Open Finder and go to your folder. Navigate to MAMP > bin > php . You will see a list of folders named php7.x.x or php8.x.x . Copy your downloaded php8.1.x folder into this directory. download php 8.1 for mamp mac
Ensure the folder name in bin/php follows the exact format php8.1.x . If you have more than two versions in that folder, move the older ones out so 8.1 becomes one of the top two. To make sure your local environment is truly running 8
MAMP relies on compiled binaries to run. The easiest way to get these is from the official MAMP servers, as they maintain a repository of PHP versions specifically compiled for macOS. Visit the MAMP Downloads Page or their PHP bin repository. Look for the PHP 8.1.x package. Download the component. It is usually a .zip or .pkg file. Inside the file, type: