I did just install more memory into my iMac if that has anything to do with anything. When you erase and format a storage device in Disk Utility on Mac, you’re asked to choose a scheme to use. My computer seems to be working fine but I would imagine that I would have to do something about this and want to make sure that I've done everything before I have to do the drastic thing of erasing. In the Disk Utility app on your Mac, choose File > New Image, then choose Image from Folder. Partition schemes available in Disk Utility on Mac. All my access codes to all my programs like word and final draft will have to be reinstalled? Do I just go into safe mode and just reinstall from the time machine or reinstall the OS system first. Use this for an external drive that will plug into both kinds of computers. If you frequently access a file server from a Mac it’s pretty helpful to map the network drive to your desktop. If you are using it for Mac only then select a format specifically for. How do I find out how much disk space I have free to store files on my computer Files & Sharing Mac Tech Ease: An easy way to find out how much free. ExFAT is the best cross platform option, designed to work on Windows and macOS systems. To resolve this, you must first erase the disk and set the Scheme to GUID Partition Map. My question is - do I need to reinstall my system and do I need to do more than a time machine backup - will I lose anything? Should I use mac genius or just the disc utility program. On macOS High Sierra, it’s used on all mechanical and hybrid drives, and older versions of macOS used it by default for all drives. I have rebooted from an a flash drive and tried to make repairs but when I've tried Drive Genius (it says I have constituency errors and it needs to be repaired) and Disk Utility says that my object map is invalid and that that the first aid process has failed. If the Scheme pop-up menu isn’t available, make sure you selected the storage device you want to eraseit’s at the top of the hierarchy. Click the Scheme pop-up menu, then choose GUID Partition Map. Disk Utility failed - have I exhausted all the steps I have drive genius and have also tried Disc Utility. In the sidebar, select the storage device you want to erase, then click the Erase button.
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