Magento Open Source 2.4.2 system requirements

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Summary

E-mail server
OS (Linux x86-64)
PHP Extensions
PHP OPcache
PHP settings
RAM
System tools
SSL
Web browsers
Xdebug

E-mail server

Mail Transfer Agent (MTA) or SMTP server.

Operating Systems (Linux x86-64)

RedHat Enterprise Linux (RHEL), CentOS, Ubuntu, Debian and the like. Magento is not supported on Microsoft Windows and MacOS.

PHP extensions

ext-bcmath
ext-ctype
ext-curl
ext-dom
ext-gd
ext-hash
ext-iconv
ext-intl
ext-mbstring
ext-openssl
ext-pdo_mysql
ext-simplexml
ext-soap
ext-xsl
ext-zip
ext-sockets

PHP settings

PHP version 7.4. Magento 2.4.0 also works with PHP 7.3, but PHP 7.4 is recommended.
Memory limit -memory_limit = 2G
PHPUnit (command-line tool) 9.0.0
realpath_cache:

;
; Increase realpath cache size
;
realpath_cache_size = 10M

;
; Increase realpath cache ttl
;
realpath_cache_ttl = 7200

PHP OPcache

PHP OPcache must be installed on the server. PHP OPcache is required to ensure good Magento performance.

RAM

Up to 2 GB of RAM is required to update Magento 2 and Magento 2 extensions from Magento Marketplaces and other sources. If you are using a system with less than 2 GB of RAM, create a swap file.

System tools

SSL

You must have a valid security certificate for HTTPS installed. Self-signed SSL certificates are not supported. PayPal and repo.magento.com require TLS 1.2 (Transport Layer Security) or later.

Web browsers (backend & frontend)

Newest versions:

Microsoft Edge
Firefox
Chrome
Safari (only Mac OS)
Safari Mobile for iPad 2, iPad Mini, iPad Retina (iOS 12 or newer), for frontend
Safari Mobile for iPhone 6 or newer; iOS 12 or newer, frontend mobile
Chrome for mobile (Android 4 or newer) frontend mobile

Xdebug

php_xdebug 2.5.x – on development mode for better performance.