If your Mac starts up to a circle with a line through it - Apple

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. 

Crossed out circle at boot up. Recovery n… - Apple Community

Mac OS install on AMD Ryzen (VMWare) Opencore

MacBook Pro suddenly stopped working, the technician says the

My computer is completely damaged - Apple Community

Mac Basic Startup Troubleshooting Steps - Apple Community

Mac shutting down for no reason, and unab… - Apple Community

Si su Mac comienza con un círculo con una línea que lo atraviesa

2010 Macbook Air failing startup - Apple Community

Apple locked my Mac Pro

MacBook Pro suddenly stopped working, the technician says the

If your Mac starts up to a circle with a line through it

Late 2010 Air Not Able To Connect To Reco… - Apple Community

Stuck on circle line logo after disabled unsupported gpu. : r

Mac OS install on AMD Ryzen (VMWare) Opencore