A circle with a line through it means that your startup disk contains a Mac operating system, but it's not a macOS that your Mac can use.
Mac OS install on AMD Ryzen (VMWare) Opencore
Mac Mini won't restart after Mail crashed… - Apple Community
I accidentally reset my MacBook Pro witho… - Apple Community
Cancel sign what does that mean - Apple Community
Erased HD - Apple Community
Mac Smart People I Know
Help me regarding issue 2106F when I trie… - Apple Community
Mac OS install on AMD Ryzen (VMWare) Opencore
Did Apple block HS installation for 2018 MBP ?
My startup screen is a circle with a slas… - Apple Community
Startup issue. PLEASE HELP - Apple Community
Mac Basic Startup Troubleshooting Steps - Apple Community
Mac OS install on AMD Ryzen (VMWare) Opencore
Functional 12 Powerbook G4, Trying to Install OSX Panther
