Some time ago I split the hard drive (500gb) in two partitions (250 each), now I have first successfully erased one partition but I still have the second one (Mac HD 2, which runs Mavericks) but I can not deactivate to erase it.
Anytime I try to remove it or deactivate it, this is the message:
"Deactivation failed, make sure that all the files and applications are closed"
I am working on an other Hard Disk SSD 250 gigabyte which runs Yosemite, and I want to use the other 2 partitions for storage.
I assume that I am still using some applications and files coming from that partition and that's why I cannot proceed with the erase?
What you recommend for me to in this case? Deleting all the applications manually in the Hard Disk to make sure I am not running any of them? Is there any way to check which application(s) or file(s) are in use which causes the problem?