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User profile for user: JandT58
JandT58 Author
User level: Level 1
14 points

MacBook Pro / Circle with Slash on Startup

I just tried to reset my mac to factory settings and its not working. It is showing a Circle with a Slash through it, like a no Smoking sign.


I bought an external hard drive and exported all important information. Then i followed prompts I've found online.


I signed out of everything.

Followed Steps to Reformat my hard drive.

When i followed next steps to turn on mac and hit Command R during apple Logo start up, After about 10 seconds, the Symbol came up and I can't do anything else.


Please Help.

MacBook Pro

Posted on Feb 26, 2018 10:48 AM

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User profile for user: Encryptor5000
Encryptor5000
User level: Level 5
7,568 points

Posted on Feb 27, 2018 9:23 PM

If you see a circle with a slash, your macOS system folder is likely damaged.

Based on your current circumstances, you’ll need to use another Mac in order to repair yours. Connect an empty flash drive to the other Mac and create a bootable installer using the steps in this article:


https://support.apple.com/en-ca/HT201372


Make sure your flash drive is named MyVolume before using the Terminal command.


Once you’ve made a bootable installer, connect it to your malfunctioning Mac and hold the Option key while turning it on. Release when you are presented with various startup disks to choose from. Use the arrow keys to select Install macOS High Sierra, then hit Return (Enter). Your Mac should proceed to boot Recovery Mode using the flash drive. When the Utilities menu appears, choose Reinstall macOS. (You will not lose your data.) Select Macintosh HD as the target volume and let the installer repair your Mac. If all goes well, your Mac should restart to the login screen when it’s done (or to a setup assistant if you wiped your hard drive).


Hope this helps!

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Question marked as Top-ranking reply
User profile for user: Encryptor5000
Encryptor5000
User level: Level 5
7,568 points

Feb 27, 2018 9:23 PM in response to JandT58

If you see a circle with a slash, your macOS system folder is likely damaged.

Based on your current circumstances, you’ll need to use another Mac in order to repair yours. Connect an empty flash drive to the other Mac and create a bootable installer using the steps in this article:


https://support.apple.com/en-ca/HT201372


Make sure your flash drive is named MyVolume before using the Terminal command.


Once you’ve made a bootable installer, connect it to your malfunctioning Mac and hold the Option key while turning it on. Release when you are presented with various startup disks to choose from. Use the arrow keys to select Install macOS High Sierra, then hit Return (Enter). Your Mac should proceed to boot Recovery Mode using the flash drive. When the Utilities menu appears, choose Reinstall macOS. (You will not lose your data.) Select Macintosh HD as the target volume and let the installer repair your Mac. If all goes well, your Mac should restart to the login screen when it’s done (or to a setup assistant if you wiped your hard drive).


Hope this helps!

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MacBook Pro / Circle with Slash on Startup

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