2020 FIX MacBook could not mount “disk2s2”

This will usually happen when you insert an NTFS USB flash drive or external drive in the format NTFS, which is a windows format and Mac is able to only read not write... so you’ll get such errors like:

Errors: couldn’t modify partition map. : (-69874) operation failed...

[lilwoo]

than u for that, but do u have an solution if I don't want to erase the data in the hard drive ? thanx ;-)

[pratham]

Thank you, liked and subscribed because it worked

[LefterisEleftherios]

You did save the day; very grateful. Thank you.

[SanskrutiKarnawat]

Yo! What if I don't want to erase all my data?

[akbarkhamraev]

Looks good, I follow all step use passed but get same error as you before :( (on erase)

Broo I was stuck in recovry mode and cant mount just do the first thing that u try and u got a an error (erease part) and fixed! Thanks