minecraft

We have a MacBook Air 13" early 2014 with a 1.4 ghz dual core intel core i5 processor. It's running the latest version of 11.0.1 MacOS Big Sur

My son is trying to play Minecraft on it and it's very glitchy. When he logs into another Macbook air (early 2015) running MacOS Catalina Version 10.15.4, 1.6 ghz processor, it runs with out glitches.

These are Minecraft's Mac system requirements:

OS: 10.9 Mavericks.

Processor: Intel Core i3.

Video Card: Intel HD Graphics 4000 or higher.

Memory: 4GB RAM.

Hard Drive: 1 GB of Hard Drive space, though this can increase drastically depending on the worlds you install.

with these facts, why glitchy on one and not the other. Both devices are above the listed system requirements.