But even if I don't partition the unallocated 20GB at all I can't format them to Mac OS Extended (Journaled) with the Disk Utility! The unallocated space is just grey and all the buttons like 'Options', 'Revert' and 'Apply' as well as the 'Format:' are just grey. If the currently installed OS is not on your purchase list you must upgrade to at least macOS 10. Reformatting would erase the drive so you would. Without third party software, to access the drive in Windows and Mac would require the drive to be reformatted in a file system recognized by both Operating Systems such as exFAT. Mac OS Extended (Journaled) Windows cant access a Mac formatted drive. Check this in the Apple menu > App Store > Purchased. Open Mac Os Extended Journaled Windows 10. This may be APFS, or it may be Mac OS Extended (Journaled). For macOS 10.11 or earlier, the currently installed OS must already be in your Mac App Store account. Disk Utility will automatically choose the format for you. Click on the Erase option from the four options available in the main window. You can disable Core Storage to solve this problem.
#Erase mac os extended journaled encrypted mac os x#
For instance, if you are running HFS+ for Windows by Paragon Software in a BootCamp configuration, you won’t be able to see the Mac OS X system drive due to Core Storage restrictions. There are several issues that may lead to this problem. The UFS+ is the file system by Apple’s Macintosh and if you are using a Mac-formatted drive on your PC, chances are it’s not readable by Microsoft Windows 10.