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Osx cannot unmount disk12/17/2023 ![]() ![]() I gave it half an hour, then thought I'd leave it as long as necessary, got up the following morning and still waiting, hadn't done a thing. Unable to format SSD I've been using HDD file storage and SSD High Sierra on 2011 MacBook Pro for many years now, SSD needed replacement backed up, made bootable USB but also CCC'd HS over to a fresh partition on HDD, just in case? Glad I did, tried allsorts over the last fortnight (and two brand new SSD's), just can not get them to format?įit new SSD, start in recovery, new drive registers "would you like to initialize", yes, choose APFS unmounts, preparing to format, waiting for the partitions to activate.Īnd there it stays. ![]() P.S.: I tried all formatting types(APFS, Mac OS extended, ExFAT) and still got the same result. But after some documents, I get the same result. It worked but after I write two documents (pdf or zip file containing pdfs) on my ssd, it fails again. This time it says 'The volume on disk4 couldn’t be unmounted because it is in use by process 0 (kernel).Couldn’t unmount disk. : (5)' Also, I can not erase it from the Disk Utility. POSIX reports: The operation couldn’t be completed. I get the error message 'Fixing damaged partition map. It can not write or read data and sometimes ejects it by itself. However, when I use it on my Mac (with the applicable format), it works at first but fails later. The external ssd works well on a Windows computer. I recently bought a MacBook Pro M1 and a Sandisk SSD. When I list the disks on terminal it shows my ssd:Įxternal SSD malfunctions on a Macbook Pro M1 but works on Windows Hi everyone, When I try first aid on the volume named 'External SSD'' it says: "Volume could not be unmounted".When I try first aid on the whole disk, it says: "Problems were found with the partition map which might prevent booting".When I try to eject it, a warning shows up saying that it is in use and asks me whether I want to force eject.When I try to erase the whole disk, it shows: "The volume on disk4 couldn't be unmounted because it is in use by process 0 (kernel).When I try to move an app to the ssd, it says: "The operation can't be completed because an unexpected error occurred (error code -50)".Try moving the archive to another volume" When I try to write, read data or expand zip files inside the ssd, it shows the error: "Error identifying a writable temporary folder.How can I fix these errors?ĮRRORS: (Sorry, I could not upload the screenshots due to storage limit) It worked well once but then, there were problems while reading and writing. I erased from a Windows PC then initialized on the Mac and tried again. Then, I partitioned it into 3 parts (2 of them Mac OS extended, 1 ExFat). First I partitioned into two Mac OS extended parts. I tried also other formatting types and there were no problems. I recently bought a MacBook Pro M1 and a SanDisk external ssd. ![]()
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