Can I upgrade an apple Mac Pro mid 2010 running mohove 10.14 to catalina 10.15

You need a late-2013, or 2019 Mac Pro to run Catalina. If you are abbreviating MacBook Pro as Mac Pro, then you would need a mid-2012 model or later (but not Apple Silicon) to support Catalina.

Hi,

Simple answer, no. Mojave 10.14.6 is the maximum OS for that Mac.

As I understand it the Microcode in the CPUs cannot be updated to cover a big security problem.