Repair mac os x base system


  1. The Terminal Way
  3. Repair Your Mac's Drives With Disk Utility's First Aid
  4. Using First Aid

It is grayed out along with the restore and unmount selections.

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Any suggestions? After rebooting and configuring your system download and install macOS Sierra.

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  6. I appreciate your response however I cannot select erase. What can I do to free up the memory? Perhaps I misunderstood the steps that you suggested. The iMac automatically loads up to internet recovery mode. I think I saw a previous posting when you helped someone with this sort of problem. AmberKhan If disk0s2 with 1. I erase Apple HDD correct?? And not the OS X Base system? This might be a silly question but it looks like I have two internal hard drives.

    You have to erase the internal disk. Featured on Meta. Congratulations to our 29 oldest beta sites - They're now no longer beta! Unicorn Meta Zoo 7: Interview with Nicolas. Related 2.

    The Terminal Way

    Or if I erase Macintosh HD, will that erase the entire disk, both free and non-free space? It doesn't say "Erase all areas of the disk", it just says "Erase all data ".

    Mac OS X Yosemite Clean Install

    So I'm wondering if areas of the disk which do not contain data would not be erased, and if I instead have to use "Erase Free Space" to accomplish that. Sorry for the long wait for reply. Shouldn't matter either way unless there was some serious top secret files on the drive. The OS will take care of everything if you just do "Erase". Use of this site constitutes acceptance of our User Agreement and Privacy Policy. All rights reserved. Want to join? Log in or sign up in seconds. Read the rules, then. Ask a Question!

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    4. In the Mac OS X Disk Utility, what is the First Aid function, and when and how should I use it?;
    5. Does Reinstalling macOS in Recovery Mode Delete Everything on Mac?.
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      Repair Your Mac's Drives With Disk Utility's First Aid

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      ReInstall OS X on a Mac Using Internet Recovery

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      Using First Aid

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      Welcome to Reddit, the front page of the internet. Become a Redditor and join one of thousands of communities. Would you give me instructions on how to: 1 Wipe this disk as completely as possible, and 2 Reinstall the OS without a CD? Please let me know if you need any more photos or info. EDIT: Why are all my comments being downvoted? Being a newb isn't a crime. Want to add to the discussion? Post a comment! Create an account. Should I choose "Erase"?