Sierra HDD not working

[Mac_Man777]

Hi! I've recently installed Mac OS X Sierra.

After installing Mac os x Sierra my hard drive had stopped being read.

I've went to disc utility and tried first aid, it didn’t work. I have rebooted my computer. Went to disc utility again and tried first aid again, didn’t work. It said that my hdd is not initialized, when i went to info it says that my drive is not writable, it can’t be repaired, can’t be verified & can’t be bootable. I've also tried to run my hard drive on a windows computer, and it worked perfectly fine, the drive wasn't full and the files were all in place.

I've contacted apple through feedback assistant, but I've got no reply for almost a week. Please help, I've left the pictures for you to have better understanding of the problem I have.

 

[DeltaMac]

Do you need to use that external drive on BOTH your Mac, and on other Windows PCs?
If not, the drive is formatted NTFS, and is not natively writeable (you can't add files, or modify files on that drive from your Mac).
But, the Seagate drives usually come with NTFS drivers that you can install on your Mac. It's likely that the driver is just not compatible with Sierra. You could try Seagate tech support to see if there is any issue with the tuxera drivers for your Seagate drive - and Sierra.
If you don't need the drive with Windows, the easiest fix is to back up the files that you might want to keep, then reformat the drive in a Mac format (MacOS Extended) Copy your files back to the drive once you have completed the reformat.

 

[Mac_Man777]

Do you need to use that external drive on BOTH your Mac, and on other Windows PCs?
If not, the drive is formatted NTFS, and is not natively writeable (you can't add files, or modify files on that drive from your Mac).
But, the Seagate drives usually come with NTFS drivers that you can install on your Mac. It's likely that the driver is just not compatible with Sierra. You could try Seagate tech support to see if there is any issue with the tuxera drivers for your Seagate drive - and Sierra.
If you don't need the drive with Windows, the easiest fix is to back up the files that you might want to keep, then reformat the drive in a Mac format (MacOS Extended) Copy your files back to the drive once you have completed the reformat.

THANK YOU VERY MUCH!

 

[Nolanesque17]

THANK YOU VERY MUCH!

How do you go about reformatting the seagate external hardrive to work with Sierra macOS?
[doublepost=1473825788][/doublepost]

Do you need to use that external drive on BOTH your Mac, and on other Windows PCs?
If not, the drive is formatted NTFS, and is not natively writeable (you can't add files, or modify files on that drive from your Mac).
But, the Seagate drives usually come with NTFS drivers that you can install on your Mac. It's likely that the driver is just not compatible with Sierra. You could try Seagate tech support to see if there is any issue with the tuxera drivers for your Seagate drive - and Sierra.
If you don't need the drive with Windows, the easiest fix is to back up the files that you might want to keep, then reformat the drive in a Mac format (MacOS Extended) Copy your files back to the drive once you have completed the reformat.

How do I go about reformatting the seagate drive to work with macOS Sierra beta?

 

[DeltaMac]

First, you will lose EVERYTHING on that drive. Backup any important files that you don't have backed up somewhere else before you start.

Open Disk Utility.
Click the line in the left-side list for your Seagate device - it will have the model info, and not the partition name.
Click the Erase icon.
Change the Scheme to either Apple Partition Map, or GUID. GUID is probably a good choice for a 2TB drive. Just make sure that Master Boot Record is not selected. That's what you want to change.
Change Format to Mac OS Extended (journaled)
Enter a name, if you like.
And, click Erase.
Takes a few seconds to complete, and you're done!