EricMiller123 Said:
"MacBook Pro update: [...]under system preference it gives me the option to update but when I click it it says unavailable. It won’t let me download off a web browser either."
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Troubleshooting Mac Update Errors:
Try the following...
A. Create a Temporary Admin:
See what happens when you use a new administrator to install this. If it works, then there is an error in your current user.
B. Update in Safe Mode:
If you can't click something, then try it in Safe Mode [Hold Down: the shift key upon boot]. In Safe Mode, Login Items do not open at login; certain preferences are set aside; and damaged system files (i.e. caches) are fixed. Go Here: Start Up your Mac in Safe Mode - Apple Support
C. Use Ethernet:
On the computer, you connect it through Ethernet, going directly into your router. For a Mac (or PC) that does not have Ethernet, this would be the adapter to use: Belkin USB-C to Gigabit Ethernet Adapter - Apple