Going 'Old Skool'
My MacPro was originally a 4.1 running OS X 10.8, I’ve flashed it to a 5.1 and it’s now running OS X 10.14 (Mojave), I was hoping to use the Decklink with it, but none of the drivers seemed to work so I put the card away to one side, after all it only cost me less than £20.
3 days later a friend turned up with 13 3 hour VHS tapes from the late ‘80’s and early 1990’s to digitise. The Decklink card would be idea for this as I could setup a dedicated capture system and leave it running - I just needed a MacPro to run the card.
Looking on Facebook Marketplace I spotted a pair of MacPro’s running 10.8, one was a Dual 2.8, the other a Dual 3.2 - I offered the guy £150 for the pair and was soon on the way to Bristol to collect them.
Back home, they both fired up, I cloned the hard drives to SSD, fitted the Decklink2 card in the Dual 3.2, added a 2Gb drive for the captured video files, and after loading the drivers from Blackmagic, Media Express capture was working with a VHS feed from a VHS deck.
The next day I tried to setup a dedicated capture station, feeding the 30 year old VHS tapes in via composite gave me a badly broken picture with a loss of picture sync, it needed a TBC (time base corrector) to solve the problem. After trying several possible solutions, including an old Panasonic MX50 from the garage, I then tried Y,R,B using a JVC BR-HD50 deck via pass-through, this solved the problem and I’m now on tape 4 of 13, just 9 more to go.