Step 2: When your Mac is restarting, hold the 'Command + R' keys. Make sure you hold these keys until you see the Apple Logo on the screen after restart. It will allow you to connect to the internet to get a new operating system download to start the process over. But before you start fixing your Mac download problems, run a scan of your computer first to make sure there are no corrupt files or cache affecting your App Store. You can use Mac repair app to scan and clean up your computer for all types of junk.
Are you signed in to the App Store?
Make sure that you’re signed in with the right Apple ID.
Do you have a valid payment method on file?
You might need to have a payment method on file, even if the app that you want to download is free. You can add a payment method or edit your payment method.
Why Can't I Download Apps On My Macbook
If you can't update apps and you see a message that says “your account is disabled in the App Store”, there might be a problem with your payment method. Contact Apple Support for assistance.
Is the App Store available?
Check Apple’s System Status page to see if the App Store is temporarily unavailable in your country or region.
Manually update the app
Open the App Store and try to update the app manually.
Learn what to do if you see a message that says you can't connect to the App Store.
Is your Mac connected to the internet?
Restart your Mac
Restart your Mac. Then check to see if you can download or update apps.
Contact Apple
I Can't Download Anything On My Mac Computer
If you still can't download or update apps on your Mac, contact Apple Support.