iMac Retina 5K Late 2015 - why does the mouse move in jerks?

Question

Iron

At first it seemed that the graphics did not take out - the mouse barely drags the windows on the table with jerks, like a cheap wireless one with 300dpi. But after connecting a cheap Dexp wired, I realized that the graphics performance is excellent, it's the heavy Apple Magic Keyboard mouse that came with the iMac. Has anyone had this or is it a marriage? They put a rug on, didn't help. One gets the feeling that the BT channel does not take out.

Answer 1

This is due to the fact that the mouse from Apple has about 300 dpi, and on a 5K monitor it is very small.
Buy another one with at least 2000 dpi.