My Passport for Mac is not recognised by my MacBook Pro

jonabrams wrote:

I’m having a similar problem… Hard drive was working ok until tonight. I’m usually quite careful about unplugging it so not sure how it could have become corrupted.

You do not say what your similar problem is.  Before unplugging, you must FIRST EJECT the disk.  Was this done?

Have you tried repairing permissions & restarting your comp?