Step One To check if an update is available for your operating system. from the Apple menu at the top left of your screen.
As always, I hope this helps anyone looking to upgrade.
What i know for sure is, that my macbook wanted to flash a firmware afterwards. And as a result, every boot followed the firmware flash procedure because apparently, the flash flag (wherever that might be) stayed set: Long wait with a black screen - Start the boot process The Mac Book isn’t booted that often (sleep ftw!
), but it was quite annoying to know that something was kaputt.
Click the Update button, or if you want to install all the updates available for your computer, click the Update All button.
Step Three A popup will appear warning you that you will need to restart after the download is complete.