I turn on my computer and it only shows a persistent gray screen, an Apple logo, spinning gear, spinning globe, prohibitory sign, or a folder with a flashing question mark.
- First shut down your Mac. You may need to hold down the Mac’s power button for several seconds to turn it off.
- Disconnect all external devices and Ethernet cables (except your mouse, keyboard, and monitor if applicable). If you are using a third-party mouse or keyboard, disconnect those too.
- Now that your external stuff is disconnected, start the Mac and see if the external devices caused the problem. If so, reconnect them one at a time to see when the problem returns.
If these steps don’t resolve your problem, try performing a Safe Boot. If a Safe Boot doesn’t work, try resetting your PRAM/NVRAM. Next try “How do I repair my Mac’s hard drive's directory (repair disk)?” If none of those steps work, bring your computer in for service.
Published November 25, 2011 10:57 AM
Last modified on November 25, 2011 10:57 AM
Related Links
How do I reset the PRAM or NVRAM?What if my computer won't wake from sleep?
I press the power button, and nothing happens. My Mac won't start.
I turn on my computer and hear a series of beeps, or I see the power LED blinking a repeating pattern.
I turn on my Mac and see a blinking prohibitory symbol or blinking folder.
Can I make things worse by doing repairs with DiskWarrior, TechTool Pro, or similar disk repair utilities?
When I start up my Mac it stays on a blue screen and never shows the desktop.
What is a “Safe Boot” and how do I use it?
How do I reset the System Management Controller (SMC) or Power Manager (PMU)?
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