![]() There are several different ways to fix the “couldn’t unmount disk” error message on Mac. How to Fix “Couldn’t Unmount Disk” Error on Mac Use Stellar Data Recovery Professional for Mac if you encounter any kind of data loss and are in need of a quick and easy data recovery solution. Make sure to use Time Machine or other third-party services to backup your Mac and protect your files. This becomes especially important whenever you try to fix any disk-related problems, including when you can’t unmount the disk on Mac. We all know that it is recommended to do regular Mac backups. Before Fixing the “Couldn’t Unmount Disk” Error Trying to perform any drive modifications would fail to give you the “couldn’t unmount disk” error message. You are also unable to partition, reformat or erase the disk you are currently booted from. The system won’t allow you to do anything if some other application or process uses the drive. Why is Mac Giving You the “Couldn’t Unmount Disk” ErrorĬan’t unmount disk on Mac usually happens when you try to do some manipulations with the external or internal drive. How to Fix “Couldn’t Unmount Disk” Error on Mac.Before Fixing the “Couldn’t Unmount Disk” Error.Why is Mac Giving You the “Couldn’t Unmount Disk” Error. ![]() Kind of hard to do when they don't even show up on my desktop. They just kept them and didn't specify exactly why, just generally that they had been tampered or altered. I did as their tech department instructed, sent them back for replacements. Other than that, I don't see where I went wrong. ![]() so I didn't buy the warranty, where I could have just taken them back to the store. I didn't do this because my dad used to sell them and he knew how often they were actually used, that it isn't worth the money's and the fact that so many past drives always work. What I did wrong? I didn't buy the warranties. Of course, there's nothing new on the status according to the support page. I finally emailed them again (polite) explaining this all again, and asked for at least a timetable on an answer, and was told to expect one this past Monday. That was bumped up to a Level 2 Technician, and nothing happened with this for about ten more days. So, I've had a phone call with support, and a chat with online support who told me to email the department who told me that they weren't going to replace them. They didn't even specify exactly what was wrong with them. I get an email telling me they've been tampered with (modified, something like that) and that I will be receiving no replacements, nothing. Two weeks go by, there's no update on the RMA page even though USPS had confirmed delivery. So, I take the time and effort to box them up very well, drive to the post office and pay forty bucks to send them away. I contact Western Digital, they tell me to send them back for replacements. as this isn't my first rodeo with this kind of thing. I tried a different computer, different cables, power supplies, safe start, etc. One can be seen with the Western Digital software tools, but in reformatting it, the drive just stalls for hours. So, I had to go to two different stores because no single store had two of these drives. I do this every year-and-a-half to two years, and the previous drives go into secure storage. I'm a bit gun-shy about external hard drives right now because I (here's a story) watched the ads for weeks, then went to OfficeMax/Depot and purchased two Western Digital 10TB hard drives. Thanks a lot! You've saved me a lot of time in troubleshooting. ![]()
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