Off topic → Minecraft related → A question for all you apple mac users
It may just be me.
I have an old model and have upgraded it probably a bit to far.
And thank you ABritishGamer for your response ingame
I was using my mac for ~ 4 - 5 years-
When you don’t run more than 10 applications in the background, it should be fine. Mine was from mid-2007 (so not the fastest). Try to decrease your render distance, if that doesn’t help.
Otherwise I would consider using OptiFine.