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guid partition

  1. Z

    Unable to boot using USB Bootable drive on Mac

    Hi everyone. My dad has an iMac late 2011 with Mac OS x lion. He has not used the machine for a while and the certification is out of date. He was unable to browse on the internet and occurring error popped up «Your clock is ahead of time» researched it and came to the conclusion that...
    • Ztrader
    • Thread
    • bug guid partition help problem with mac software
    • Replies: 1
    • Forum: macOS
  2. Lyrik

    Disk Partition Problem

    I used this common in terminal (diskutil partitionDisk disk2 GPT HFS+ newdisk R) from another post here to try to get my 1TB Toshiba External USB HD to work on both PC and Mac. I was trying to do this WITHOUT erasing any files on the drive. Not only did it repartition, it erased everything and...
  3. A

    High Sierra update failed, refailed and failed some more.

    For some reason the update from Sierra to High Sierra on my Mini 2012 went wrong. I know I should have made an update, but I got lazy when everything went fine for three years. So when I got stuck in recovery mode, I was realy stuck. The only install option in recovery mode erases the entire...
  4. O

    TWO DIFFERENT HARDDRIVES ON MY MAC ONE FULL ONE NOT????

    Hi! So maybe I am really stupid- but I don't think I am truly THAT dumb! I recently purchased a mid-2012 Mac Book Pro from Gumtree (a classifieds site in Australia)... went to their house, the laptop seemed in good condition and they said they only ever watched movies etc on it...The house i...
    • oliviapreston1
    • Thread
    • guid partition hard drive advice hard drive problem help me help needed high sierra journaled partition mac book pro 2012 partitioned mac two hard drives
    • Replies: 7
    • Forum: Mac Basics, Help and Buying Advice
  5. M

    Can not format drive with GUID

    I want to delete my external 1TB USB Drive and format it with "Mac OS Extended (journaled)" and GUID Partition Scheme but the button for partitioning the drive is greyed out and non clickable. I can delete the Drive but the option to choose the Partition Scheme is not there and it automatically...
    • meilon24
    • Thread
    • disk utility drive external drive guid partition partition usb
    • Replies: 1
    • Forum: macOS
  6. tillkrueger

    internal mSATA non-destructive conversion from GUID to APM, possible?

    Hi, I just upgraded my mid-2012 Retina MacBook Pro from its internal 500GB SSD "card" to a 1TB Samsung EVO 850 mSATA card (using an adapter)...in the past, I had done so with the OWC upgrade kit, without issue, but since this is more of a "home-made" solution, using a readily available and much...
  7. ViperDesign

    This disk doesn't use GUID partition

    I get this error when trying to install on an upgraded HD in my mac mini. It is a Samsung HD I installed to upgrade my mac mini. I downloaded High Sierra and it won't allow me to update to it because of this issue. Anyway around this? Thanks for any help
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