Use ONLY 'without caches', at first. Press space while hovering over Install macOS Sierra from Mac HDD, or something similar. Run the Install macOS Sierra from Apps. Use fsck in Single-User Mode In some cases, even Safe Mode or Disk Utility in OS X Recovery won’t be enough to fix problems.Also unmount WINDOWS partition if you can see it from Mac 6. Partition Drives and Format PartitionsThe Disk Utility interface is the same one you’ll see on your Mac OS X desktop, but run it from here and it’ll be able to repair problems with your system drive.Boot to internet recovery or a USB drive with the High Sierra Installer (standard Sierra recovery mode won't do). MacOS High Sierra requires user consent in order to load kernel.1. 10.Disk Utility shows internal drives and connected external drives (like USB drives), as well as special image files (DMG files) that you can mount and access as drives.24540 Unable to add ThawSpace for user if volume with the same name already exists (add.
![]() ![]() Sierra Unable To Unmount Volume For Repair Mac OS XYou can also choose to only erase its free space.You can use this feature to securely wipe a hard drive. Click a drive, then click the “Erase” button, then click “Security Options” to select a number of passes to overwrite the drive with. Secure-Erase a Partition or DriveThe Erase button allows you to erase an entire hard disk or partition. This feature checks the file system for errors and attempts to correct them, all without much intervention from you.Simply click the drive you want to check, then click the “First Aid” button. Be warned that these checks can take a while, and running them on your system drive will leave you with an unresponsive computer until it’s done. You’ll see the above prompt.RELATED: How, When, and Why to Repair Disk Permissions on Your MacIf a hard drive is acting up, Disk Utility’s First Aid function is the first thing you should try. One of them: volumes on the same drive pool storage space, meaning you’ll see two separate drives in Finder, but won’t have to manage how much storage space each volume uses. To add a new APFS volume, simply select your system drive, and then click Edit > Add APFS in the menu bar. Create and Work With Disk ImagesRELATED: How to Create an Encrypted Disk Image to Securely Store Sensitive Files on a MacClick the File menu in Disk Utility and use the New menu to create blank disk images or disk images containing the contents of a folder — these are. Performing the “fastest” erase of the internal drive from recovery mode will erase everything. Don’t perform a secure erase on a solid-state drive, such as the ones built into modern Mac Books—that will just wear down the drive for no advantage. The maximum number is unnecessary.RELATED: How to Securely Wipe a Hard Drive on Your MacNote that this feature will only be useful on mechanical drives, as you shouldn’t be able to recover deleted data from a solid state drive. The best system cleaner for macSelect the drive you’d like to create an image of, and then click File > New Image > Image From. You can use it to copy the contents of one partition to another, or to copy a disk image to a partition.You can also create a disk image that contains an exact copy of an entire partition. Copy Volumes and Restore Disk ImagesThe Restore feature allows you to copy one volume to another. You can then upload this encrypted DMG file to cloud storage locations or save it on unencrypted removable drives.The Convert and Resize Image buttons will allow you to manage that disk image from the Disk Utility window. This is particularly useful because you can encrypt that DMG file, creating an encrypted container file that can store other files. If one drive dies, your data is still available elsewhere. This is an advanced feature most people won’t need to use, but it’s there if you need it.Mirroring (RAID 1) means data you write to the RIAD is stored on each partition or drive for failsafe purposes. Combine disks and partitions into one or more RAID sets and choose whether you want to mirror, stripe, or concatenate your data. RAID SetupRELATED: How to Use Multiple Disks Intelligently: An Introduction to RAIDThe Disk Utility also allows you to set up RAID on a Mac: just click File > RAID Assistant in the menu bar.
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