Could not mount “Seagate”. (com.apple.DiskManagement.disenter error 49223.) message

I think we have already clarified that this issue is not related to third party tools and also appears when you are not using them. I haven't expected there to be that much guys defending Apple at all cost by lacking any helpful information why in nearly 2020 a harddrive bought in the next store should not be able to be used without any hassle with any modern operating system.

Since exFAT is still a disk formatting option on Disk Utility for Catalina, it doesn't seem that Apple has dropped support for it.

I get the same error message when I connect my external ExFAT Master Boot Record haddrive via Catalina. Still searching for a solution to get it working again.

The MacOS disk utlility first aid ran successful, but the harddrive is still not accessible.

Thanks for the tip. I installed the Seagate Paragon Software too, but I am still not able to activate the harddrive: "Unable to load the system setting NTFS" appears.

Fair enough. I'm just sharing my first hand experience.

-dave

Just search this error message on the internet and count how many customers encountered the same problem. This is not isolated to Seagate. Catalina is not reliable. Fix it.

My 5 TB external harddrive is powered via external power supply and the Mac can't use it, so I assume Mac and harddvie are just not working together for an unknown reason.

I have read the whole thread and now concluded this is on Apple, not Seagate.

I bought the Seagate drive before Catalina. After installing the Paragon driver, from Seagate, everything worked. When I upgraded to Catalina, I needed to install a newer version (64-bit). Then it continued to work. A week ago, it stopped working on one of my computers. But it continued to work on the other. Before I triage, the other computer auto-upgraded itself to a newer Catalina. Now both computers stopped working for the drive.

I uninstalled Seagate's paragon driver, the disk mounts but read-only. I reinstalled the previously working driver (same version) and the problem reproduced.

I guess Apple may claim the Paragon driver is now incompatible with one of the later Catalina patches and I will accept that. The point is still that Apple's patch broke the driver, not the other way around.

I now have a 5TB drive that is basically useless.

Guess Seagate, Paragon, or Apple need to do something.

[Edited by Moderator]

Krakalaka wrote:

I have 2 external hard drives that are formatted the same. They both work when connected to my windows computer. The Samsung 1tb hd works when I connect to my Mac and it is powered by a wall plug. The seagate 6tb hd shows up but won’t mount, I can verify it using paragon software and is powered by the usb cable. I’ve tried using paragon software(old version/updated version), it still didn’t work.

That is one of the dangers of using a non-native macOS file system and relying on third party software to manage the drive. You may need to contact Seagate for support.

What file system is used on your 6TB drive? macOS should be able to mount an NTFS file system in read-only mode. If the drive is formatted as exFAT, then the exFAT format may be using block sizes which macOS cannot understand. To use an exFAT drive with both Mac & Windows you need to format the drive on the Mac using Disk Utility.

I have both hard drives full so I can’t just reformat the seagate. Is there any chance that it could be because the hard drive isn’t getting enough power from the Mac book? Or does the seagate hd and Mac just not play nice together?

Try using a powered USB3 hub with UASP support to connect the hard drive. This may help provide any extra power plus it will act as a buffer between the devices. Does the 6TB drive come with its own power supply or special double USB cable/dongle? Years ago I did encounter a drive enclosure which would not work on a Mac, so there is always a possibility of hardware incompatibility, but by using third party software the situation becomes more complicated. I think a 6TB drive will need extra power to work either with a double USB connector or its own power adapter.

Have you disconnected all other external devices from your Mac when trying to access the 6TB drive? Is your laptop using its power adapter?

Have you tried booting into Safe Mode to see if the 6TB drive can be mounted as read-only if it is formatted as NTFS?

Has this 6TB drive ever worked on this Mac? Do you see the drive (or the drive's controller) show up under the USB section of the Apple System Profiler? You can access this by Option-clicking on the Apple menu and selecting the first option (System Information?).

Maybe your drive is physically failing. You may be able to check the health of the external hard drive on Windows by using GSmartControl (portable app available requiring no installation). GSmartControl also has a method to run a drive's internal self diagnostics. There is no guarantee this information can be accessed since some external drive's USB controllers block the necessary communication. Maybe your Seagate software on Windows can access this information or even test the physical drive. Feel free to post the GSmartControl report for the drive here using the "Additional Text" icon which looks like a piece of paper.

If the external drives are not backup drives, then I hope you have backup copies of all the data stored on your external drives.

Imobisac wrote:

I think we have already clarified that this issue is not related to third party tools and also appears when you are not using them. I haven't expected there to be that much guys defending Apple at all cost by lacking any helpful information why in nearly 2020 a harddrive bought in the next store should not be able to be used without any hassle with any modern operating system.

I am far from an Apple fan. I've been strongly opposed to the direction Apple has been going for years now and yes Apple does make some pretty stupid decisions. I personally do not purchase Apple's computers, but am forced to use them for work. Apple is really a closed system where you do it Apple's way or you will experience difficulties. Same thing if you do something which Apple did expect.

If you search these forums you will see so many threads where updating or removing third party drive management software solved so many of the users' external hard drive problems.

Yes there can be hardware incompatibilities, but it is hard to identify the hardware issues when some people are unable to erase the drive to test without the third party software being involved. Some of the users posting here with problems may need to contact a local Apple hardware expert to physically examine their computer & drives to see what the source of their individual problem is. You also never get the complete story or system setup from people posting here so we are always working with incomplete information and many unknowns so there could be other factors involved such as security or AV software, etc. Like I said in my last post a 5TB+ drive may require extra power.

Many hardware vendors only pay lip service to macOS compatibility because unfortunately we live in a Windows centric world which is why most of these drives come pre-formatted for Windows with NTFS. Like Linux users Mac users need to research products and carefully choose & configure those products. Mac users do need to understand the hardware more than their Windows counterparts because a Mac user usually needs to do more to make hardware work properly. Mac users do have an option of purchasing guaranteed & tested products from an Apple friendly vendor such as OWC. If Mac users purchase off the shelf items at a regular store, then the Mac user will need to deal with possible incompatibilities. You know nothing of compatibility issues until you try to find Linux compatible hardware or Linux compatible firmware updaters. While Mac users are second class citizens in the tech world, Linux users are treated like the plague by hardware manufacturers. I agree it would be so nice if everyone would agree to standards and then properly implement those standards, but everyone including Apple takes shortcuts.

I was lucky and able to store my backup somewehre else so I connected my 5 TB harddrive with the Mac and made it ExFAT GUID. The harddrive itself is brand new and working okay on both Windows and Mac this way. Nethertheless I remember "strange" things like going into the next shop and find "special" hardware like harddrives with a MacOS compatible sign attached to. For those who are not too familar with re-formatting/partitioning that thing themself. ^^

When you say Seagate Software, are you referring to the Paragon or something else?

Yep I agree its lousy advice. I guess some people should think before offering any advice and consider whether their advice is actually helpful.