G.H on Windows and Mac

This is kind of a general question…
My colleague and I having problem working on the same g.h sketch. He is using Mac os and I use Windows.
When He upload his changes, I can open the g.h easily and it runs fast. However, when I upload an update, its run very slow on his Mac.
When he tries to open the old version of the project (without my new editing) its run fast.
(We both has the same plug-ins and we tried switching between Rhino7 and Rhino6)
Any Idea what can it be? Where to look for answers?

What are the differences between your changes and the ones from your colleague?
Could it be that you have a better computer performance-wise and thus set the Grasshopper parameters to compute more demanding stuff, whereas your colleague sets more conservative parameters to match his computers performance?