Its been 9 years in development, but Joomla 4 will be released on 17th August 2021 🎉🎉
mySites.guru is fully compatible with Joomla 4.0.0 Stable, and is in fact fully compatible with all Joomla versions from Joomla 1.5.0 onwards – even if the Joomla site is hacked and compromised, our tools still work and give you award winning solutions to find issues, follow and learn best practice, backup and monitor your Joomla sites.
Notes for those with mySites.guru subscriptions:
mySites.guru never performs Joomla upgrades automatically. You have to manually login and request that mySites.guru performant an upgrade.
Due to issues when Joomla 3.10.0 was first released, which, after upgrading to Joomla 3.10.0, the Joomla site would then show a one-click-upgrade path to Joomla 4.0.0 by mistake in Joomla Admin – we went ahead and then made it IMPOSSIBLE to upgrade from Joomla 3.10.0 to Joomla 4.0.0 using mySites.guru – it simply cannot be done.
Joomla 3.10.0 to Joomla 4.0.0 was never an easy upgrade – it was always going to be a migration.
Now the Joomla project accept there were issues and have moved Joomla 4.0.0 to the NEXT update stream, so that Joomla 3.10.0 doesnt see it as an available upgrade unless you have manually selected the update stream.
https://docs.joomla.org/J3.x:Joomla_3.10_points_to_4.0_while_it_claims_to_be_on_the_Default_update_server
https://github.com/joomla/joomla-cms/pull/35214
It is never going to be possible in the future to use mySites.guru to upgrade from Joomla 3.10.0 to Joomla 4.0.0. This is also because we have decided our Joomla 4 and Joomla 3 connector plugins will be different to take advantage of the new minimum version of PHP (7.2.5) that Joomla 4 has.
In order to migrate your site to Joomla 4.0.0 you need to perform a mini-migration – this includes checking all templates, extensions, plugins and modules for compatibility – DO NOT RELY ON THE PRE UPDATE CHECKER – it will flat out lie to you, a known issue!
DO NOT perform a Joomla 4 mini-migration/upgrade on a live site. Ever.
This is something that needs preparation, planning and testing on a development copy of the site first.
BACKUP before and TEST YOUR BACKUPS.
To migrate a site already connected to mySites.guru:
— Uninstall the mySites.guru system plugin
— Delete the site from mySites.guru
— Perform the mini-migration to Joomla 4
— Use the Add Another Site process to generate the Joomla 4 specific plugin and install that to your live Joomla 4 site to reconnect to mySites.guru.
Edit: Joomla 5 is now here!
Check out the mySites.guru Joomla 5 Technical Requirements Check tool!
Last updated on February 12th, 2026