Formatted usb for mac12/29/2022 ![]() ![]() ![]() I have dd read from the drive and written it to another drive and the other drive works fine - the data appears to be OK (it was lossy compressed data and the resulting file seems fine but I'll never know if it's 100% because it is lossy and I don't have or don't care to look for the exact settings I used and the files seem fine compared to the files they were compressed from). I keep the drive because it's good example of this situation. So the system can see the drive, but doesn't mount and doesn't deliver any error messages. So it appears that macOS needs to write or requires that a volume be writeable before mounting a encrypted HFS+ (Core Storage) volume. I have a flash drive that was encrypted - I'm asked for the password, I enter it, nothing happens. The flash drive needs to be un-mounted to do this but it sounds like it doesn't mount anyway. If can do a read but not a write, then it maybe in read-only mode. If you need to back up any information on the drive, first connect your drive to a computer that does recognize the drive and transfer the data to a new storage device.Building on what the previous poster said, try writing to the flash drive with dd. ![]() Choose "Mac OS Extended (Journaled)" to use the default Mac file system format. Click the "Format" drop-down menu and select the format you want to use. Select your hard drive from the list and click the "Erase" tab. Restart "Disk Utility" if you had to restart your computer to perform a repair and you still don't see your drive. You may need to restart your computer and follow the prompts to complete the repair.Ĭlick the "Finder" icon in the Dock and look for your drive in the sidebar. If the operating system already mounted the drive, an "Unmount" button displays instead.Ĭlick the "First Aid" tab and select "Repair Disk," if available. ![]() Select your hard drive, optical drive or other attached drive in the sidebar. Click "Go" and select "Utilities" from the drop-down list. Click the background to bring up the Finder menu in the the top bar. ![]()
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