What's the best movie upscaler for Mac?

I have some disc rips of really old movies and they're low quality as the DVDs only have 720p resolution, so I was looking to get a good crack of an AI film
upscaler, as AI upscaled rips look great but are rare to find and so I thought I should make an MKV out of my existing DVDs and upscale to 1080p mayself. But half of the cracks I found simply don't function. Anyone knows where to get a good AI upscaler crack on Mac, and which is best?