Disc has been ejected because one or more programs can use it

I can't eject the external hard drive with my library on it, even after the abandonment of all programs.  I have to force eject?   I tried just turn off, but when I turned back on and started the Photos, he said I should have ejected the drive before turning off.  I've recently upgraded to OS X 10.6.8 El Capitan and migrated just my iPhoto for pictures library.

Hello

Do you mean the power off using the power button or close in the list menu dropdown icon Apple? Power button would cause this warning. Stop probably wouldn't work because the drive is in use. Force to quit smoking is safer. Command/Option/ESC, then force them to leave.

Tags: Mac OS & System Software

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