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1. #Mac os extended not available for reformat with disk utility software#
2. #Mac os extended not available for reformat with disk utility free#
3. #Mac os extended not available for reformat with disk utility mac#

You should see at least two, sometimes three, entries for your drive depending on how it is formatted. If you are running 10.12 or 10.11 this step is not required as the option is not available.

Change the view to Show All Devices instead of the default which is Show Only Volumes. If you are running macOS 10.13 (High Sierra) or later it is important to change the view in Disk Utility. Note: Reformatting the drive will erase all data on the drive, so you should copy any data you want off the drive prior to formatting. Not sure what version you are using? Click here to determine your version of macOS. This article applies to the following versions of macOS: The following is not an exhaustive list of error messages, so you may not find your specific error here. That’s because the system is case preserving: It honors capitalization, but any variation in lower- and upper-case is ignored in finding a file or overwriting it.This article covers some of the common error messages and questions you might encounter while using Disk Utility.

#Mac os extended not available for reformat with disk utility mac#

If you’re copying an external or non-boot volume, you can omit steps 3 and 4 above and launch Disk Utility from your Mac in the Applications > Utilities folder.īy the way, you have of course noted that OS X and macOS have always retained the capitalization you use in names as you type it in or a program names it. Select the drive to which you restored your clone, and then click Restart. When the restoration is complete, exit Disk Utility and select  > Startup Disk. If it’s a disk image, click the Image button to find it on a mounted drive.Ĭlick Restore and be prepared to wait a long while! Reformat it using a case-insensitive option.įrom the Restore From popup menu, select your clone. Select the internal drive or boot partition in the list at left. Restart your Mac, and then hold down Command-R before the Apple logo appears to bring up macOS Recovery.Ĭlick Disk Utility in the list of options that appears. Make sure you have a separate, complete backup in case the one created in step 1 fails. (You could use Time Machine, but it’s an inefficient way to restore an entire disk except in a pinch.) For a startup volume:Ĭlone the drive that has case-sensitive formatting to another volume using Disk Utility, SuperDuper, or Carbon Copy Cloner. Instead, you have to make a clone, reformat your partition, and copy the data back.

#Mac os extended not available for reformat with disk utility software#

Because this involves filesystem-level changes, I would not use this software with 10.14 Mojave or later.) However, the last supported version of macOS is 10.13.

#Mac os extended not available for reformat with disk utility free#

(Coriolis Systems was a long-time Mac developer, and they generously made all their software free on closing.

While there was software in the past that could convert a case-sensitive partition to a case-insensitive one in place without copying the data off, the firm that made that software has shut down. They’d like to shift off that into the more standard case-insensitive format.

I’ve heard from and read of people who accidentally chose “case-sensitive” when setting up a drive, not realizing what they were getting themselves into. However, some Mac software-notably that made by Adobe and Valve-balks at case sensitivity. In olden Unix days, case-sensitivity made sense in some contexts, and Apple offered a case-sensitive version of HFS+ for compatibility’s sake for those people who required it. With the opposite, a case-insensitive filesystem, the default option for macOS in HFS+ and APFS, those files can’t co-exist: They’re all effectively the same name with a different appearance. Blue dolphin.pdf and blue dolphin.pdf and bLuE dOlPhIn.PDF are all considered different items to a case-sensitive filesystem. What a difference that “case-sensitive” makes!Ĭase-sensitive filesystems can allow multiple files to have the same human-readable name using different capitalization. With the addition of APFS formatting, that flavor is also available in case sensitive and insensitive versions. Apple has long offered two versions of the same HFS+ partition formatting scheme used to create a filesystem for a Mac-mountable volume: “Mac OS Extended (Journaled)” and “Mac OS Extended (Case-sensitive, Journaled)”.