Let’s Prepare for Mac OS 10.14 aka Mojave
Before we install or upgrade we require to backup first.
We can backup as follow:
Timemachine backup (https://support.apple.com/en-in/HT201250)
manually copying the data to external HDD
if you are using iCloud upload the documents to iCloud.
It is determined that 20GB of storage space should be more than enough to install macOS Mojave if you are out of space you can optimise (https://support.apple.com/en-us/HT206996)
If you are in enterprise you have the option to stop updating Mojave using MDM upto 90 days.
If your enterprise has more Mac and which needs to be upgraded to Mojave I recommend to set up content cache service ( https://support.apple.com/guide/mac-help/manage-content-caching-mchl3b6c3720/mac )
Check compatibility
macOS Mojave can be download from App Store on Mac computers running the latest version of OS X El Capitan or later.
To download from App Store Apple ID and password will be required.
Upgrade to Mojave:
1) Download Mojave from App Store
2) once downloaded installer will launch if not update is saved in Application folder which can be accessed from launch pad.
3) follow on screen instructions and it will be followed by restart.
Clean Install
1) Download Mojave from App Store
2) once downloaded installer will launch close the application or update is saved in Application folder which can be accessed from launch pad.
3) Using terminal command or third party tool create a USB install media.
4) Go to system Preference- startup disk- choose the installer you have created and restart.
5) Go to Disk utility and erase the storage and close the window and come back to main screen.
6) select reinstall a copy of Mac OS, agree terms and conditions
7) follow on screen instructions
8) Set a New Mac.