If the circle persists, what are my options? I have both a time machine back-up and a super duper clone on an external hard drive. I am going to try using another USB, and if that fails, try the same thing via Firewire drive hopefully. I noticed the USB light does not seem to be on during boot. I tried both the manual method and using Lion diskmaker, both with the same effects.
I also suffered from the circle with a lion through it. Before putting the new drive into my computer, I wanted to be sure my bootable ML USB worked. I recently obtained a new Samung 840 SSD. I have successfully used a USB to boot from Lion on many computers before. I just want to install a clean Mountain Lion install on my new rMBP because I originally migrated from my older MBP and there's just too much junk on my new system, which has drastically worsened my start-up and shut down times and just makes the system not "feel as new", so I want to do a fresh install and only put the stuff I really need on this MBP. My existing Mountain Lion partition on the SSD is FileVault encrypted. Both times I made sure I had a GUID partition.
Grey circle with a slash through it, spinning wheel, nothing else happens. Sometimes the thumb drive's read light is on, sometimes it isn't.Īfter reading this thread I re-did the USB thumb drive using Carbon Copy Cloner, but it's the same story. Every time I try to boot using the USB drive I get the grey circle with the slash through it and a spinning wheel and it just sits there doing nothing, even 15, 20 mins later. I made a bootable USB drive using Lion Disk Maker. The drive will be formatted HFS+, but installing macOS High Sierra or Mojave will change the format to APFS, assuming you’re installing on an SSD.I am facing the same problem as Macboy Pro. Disk Utility showing GUID option for drive formatĬlick Erase to wipe all the data that’s currently on the drive and reformat it for your macOS install. If you selected the drive name instead of its description you won’t see the Scheme option. Set the format to Mac OS Extended (Journaled) and the Scheme to GUID Partition Map. Disk Utility’s View option shows devices, not just volumes Select the drive description just above the drive name for the device you want to format. Now you should see your drive device descriptions with the drive name nested underneath. Disk Utility hides the GUID format option by defaultĬlick the View widget in the upper left corner of the Disk Utility window and choose Show All Devices. The app is hiding in the Utilities folder inside the Applications folder. Start by connecting the drive to your Mac. We’ll use an external drive for this example. Unfortunately, Disk Utility in macOS High Sierra doesn’t make that option easy to find. Formatting a drive so you can install and boot macOS requires the GUID partition map.
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