Update for Macbook air mid 2013 Mac 10.8.5

You should be able to update from 10.8 without installing 10.9. Your computer can run the current OS, which is Mojave.

Check the computer requirements shown in each link to see if your computer is capable of running that OS version.

How to upgrade to macOS Mojave - Apple Support

How to get macOS High Sierra   

Check to make sure your applications are compatible.        

Application Compatibility

Also check to make sure there is a compatible driver for your printer.

Do a backup before installing, preferable 2 backups on 2 different drives.

Use a different computer or device, or click here and ask the iTunes Store staff for assistance.

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