How to cheat?

Recently, someone accused me of cheating in chess.

1- Can someone please verify, how I could be cheating?
2- How do people cheat in chess?
3- I recently purchased Apple MacBook Pro. Is there any way I can use my computer to get better at chess?
4- With respect to all my games, does it somehow create a perception of me cheating?

5- What not to play so people won't accuse me of cheating?

People can cheat by pulling up an engine on another tab or device.

Don’t change you play because you were accused of cheating. If you weren’t cheating you won’t get banned, and you should take your opponent’s accusations as compliments.

What if I get banned?
He/She reported me for cheating. What should I do?

https://support.chess.com/article/1966-he-reported-me-for-cheating-but-i-didnt-cheat-am-i-in-trouble

https://support.chess.com/article/648-what-do-i-need-to-know-about-fair-play-on-chess-com

If you're playing cleanly, you have nothing to worry about.

That said, discussions about cheating, potential cheating, or cheat detection are not allowed in the general forums.