So yesterday i jumped into cold water by buying the update even though the recommended specs don‘t match my macbook.

I installed it, fiddled 2 min with it right before heading to the club. I took the risk of getting crashes or hiccups, plugged in my S4MK1 and my Midi Fighter and started playing. I played a 6h gig without any problems. So i can confirm that TP3 does run on pre i5 processor machines.

My MBP specs are:
Mid 2010
Core2Duo 2,4GHz
8gb ram
1tb SSD

I didn’t test the vinyl mode though. So for basic a-b mixing with the use of a lot FXs it is working so far.