hello
If you connect SSD on your Macpro you are limited by the PCI II speed, you need to add a PCI III interface and connect your SSD on it , then you will obtain the full speed of your SSD.
When you connect your your MacMini to your Mac pro
you lauch something to play until you get problem
then you go in activity monitor /memory and you note and report the values in the cartridge
MacBook Pro M3 MAX 128 GB 8TB - 2 x 48" screen --- Logic Pro --- Mir Pro 3D --- Most of the VI libs, a few Synch... libs --- Quite a few Kontakt libs --- CS80 fanatic