Hi,
My Macbook had Bitcoin Core installed. I was upgrading OS X via the Appstore but the upgrade crashed and I was no longer able to access OS X.
I took out my hard drive and saved the wallet.dat file and the blockchain and the whole directory actually.
I reinstalled OS X via USB and reinstalled Bitcoin Core. Replaced the wallet.dat file with the one I had backed up.
I let Bitcoin core download a fresh copy of the blockchain, but once it had completed, my Bitcoins still aren't showing.
I also tried a rescan via Terminal "/Applications/Bitcoin.app/Contents/MacOS/bitcoin -rescan". But no luck

I don't know a great deal about how this all works so any help would truly be appreciated.
Thanks!