Rarely, you may encounter a Mac that boots to a screen that shows a circle with a line through it, or a circle with a slash through it.

If you encounter a Mac booting into a circle with a line through it, read along to understand what is happening, and how to resolve the problem.

The Mac circle with a slash through it symbol looks kind of like this emoji, except it’s grayscale: 🚫

What does a Mac booting into a circle with line through it mean?

What the circle with a line through it means is that the Mac has found an operating system that is not compatible…