@Vlad_Riko No worries!
Feel free to ask us any questions.
The graphics card of your Mac greatly affects Astropad's overall performance.
A good graphics card can make a difference, even with older Mac models, since Astropad relies more on GPU than CPU.
For Macbook Pros, having discreet graphic card tend to perform better, even comparing with with newer Macbook models that don't have one.
Astropad works with OS X 10.9 or later; but 10.11 and above tends to have faster performance.
Retina display is ideal, especially if using an iPad Pro, since Astropad is mirroring from your Mac's screen.