Freeze/lag - Even tho' Ms & Fps is fine

Hi! First of, i really enjoy the game :) Im having a little trouble tho'. Since yesterday, i have these random freezes or lag - they occur randomly ingame, however if i use my chat or press tab, i get what seems to be a small freeze or lag spike btw 1 - 5 sec. I can still play the game, but it really affect the gameplay and fun. Im a mac user and again my Ms And Fps are just fine... ive heard other people have experienced the same, however i cant seem to find a solution. And its not going into Accesibility - Display - Mouse shaker off, cause thats been of all the time. Its some random freeze im having a hard time understanding. Hope you guys can help out! Thx in advance <3