Update WordPress Core
Before running updates, it is highly recommended to Synchronize your Child Sites so you can be sure that there is no cached data and all available updates are listed. MainWP > Updates > WordPress Updates page is just one place where you can perform updates from. The same feature is provided in the Update Overview widget on the MainWP Global and Individual Overview page.Update All WordPress Installations
- Login in to your MainWP Dashboard
- Go to the MainWP > Updates > WordPress Updates page
- In the Updates table, in the last header column, click the Update All Sites button
Update a Single WordPress Installation
- Login in to your MainWP Dashboard
- Go to the MainWP > Updates > WordPress Updates page
- In the Updates table, locate the WordPress installation (row) that you want to update and click the Update Now button
Source Article:
https://kb.mainwp.com/docs/update-wordpress-core/