External Hard Drive not able to read by Macbook Pro13 after new Big Sur version upgraded to 11.4 onward

Well if the External Drive is formatted to something Apple Computer can not understand like Ext4 ( linux format ) the Only option is to reformat it to something Apple does understand like HFS Journaled or Fat32 or exFat and with special software and Read and Write to Windows NTFS format.

Lastly - how are the drives connected to computer > Are the Directly connected ? is a HUB in between the External Drive and Computer ?

Hi SunIce79,

Thanks for posting in Apple Support Communities.

We understand one of your hard drives is not being recognized by your Mac. Has the drive been formatted to work with your Mac? If you have not formatted your drive, please do so using the steps listed in Erase and reformat a storage device in Disk Utility on Mac.

Regards.

Think the answer is already answered - the Hub might be the cause. Attach it directly and test

Hi,

I have the same issue too. Earlier it was working properly but after updating it to Big Sur V11.4 Apple M1, it didn't work. When trying to mount my external hdd it shows below error.

Could not mount “4TB”. (com.apple.DiskManagement.disenter error 49180.)

To erase or format the drive is not a solution. I hope you will understand and please let us know some feasible solution.

Thanks,

Alok Rawat

Hi Philips,

thank you for your response.

Earlier it was successfully mounted but somehow it's not working. and my other external hard drive work perfectly.

I have checked it with other mac and mounted successfully.

yes, I am using the HUB between external drive and mac.