so I recently had issues with my main disk booting up and I fixed it by restoring all the data onto a passport and using it to run my Mac but now all of the sudden, It wont boot up. It says it is bootable but it also can't be repaired so I'd like to try and fix it my self before I have to pay money to get it fixed. Please respond asap because I do need this computer for school. Thanks.
Mac mini, OS X Yosemite (10.10.4)
Is the Passport formatted to have more than one partition? If you power down your Mac and then poet it back up and hold Alt/Option key, what selections do you see?
It used to say "my passport 500gb" but now there are no options there. It used to get to the apple loading thibg and then the computer would shut down so I went into internet recovery and screwed something g up and it's no longer there
If you have a 16GB USB2 or USB3 flash drive, then you can use OS X: About OS X Recovery - Apple Support and How to install OS X on an external drive connected to your Mac - Apple Support to create an external bootable volume, which will allow diagnosing the problems with the internal and external disk, both. Internet Recovery is supported on Computers that can be upgraded to use OS X Internet Recovery - Apple Support or later models.
If you have a second Mac, then Share files between two computers with target disk mode - Apple Support
allows the working Mac to diagnose issues with a non-working Mac. It requires appropriate cables/gender-benders depending on the two Macs.
External drive no longer working
