Whenever I start up my Mac there is a screen with a circle with a slash through it. I have tried to download Os Sierra but it says that my computers validity needs to be checked with Apple.What do I do?
I started up my MacBook one day and it had a circle with a slash.I have tried to install macOS Sierra but it says that my validity has to be checked. I can’t bring it in to an Apple store as I don’t have the money to get it fixed there.