Of course, we’re talking about products like the Mac Pro, Mac mini, iMac, MacBook, MacBook Air, and MacBook Pro. The is one of the symbols that users of Apple products running macOS rightfully fear. Here’s what my MacBook Pro’s screen showed me: Over the last week, I encountered the dreaded Apple “prohibitory symbol” - do not enter sign or stop sign - twice: once when just booting into macOS Mojave 10.14 beta 4 and again when updating to macOS Mojave 10.14 beta 8. SEE RELATED: The fix to Mojave slowing down to a crawl and freezing. If Disk Utility reports that it fixed the Mojave partition - or even if it just gave the partition a clean bill of health - I’ll bet your problems will be solved.

Boot into another APFS-based partition, like High Sierra (macOS 10.13), run Disk Utility, and then run First Aid on the Mojave partition.

If you get the prohibitory symbol multiple times, you may have to shut down and restart your Mac multiple times.

You should read this entire article, but if you’re in a hurry, jump to the section covering working around hitting the prohibitory symbol twice. When installing the macOS Mojave 10.14 beta 11 and then the public macOS Mojave 10.14, I ran into the prohibitory symbol again, actually twice during both installations, but got through to the final install in both cases. FLASH: Updated 11/9/22 with a tutorial on how to obtain installers for macOS Ventura 13.0 and many older macOS versions.įLASH: Updated 10/25/18 with NEW INSIGHTS on how to deal with the prohibitory symbol.

Osx sierra wifi issues 2017 mac mini