About game development

Greetings my friends .

I want to ask a question about game development , but I want you to be as objective as you can since this is an apple forum .

I am currently learning game development and I have a Mac mini . It's a late 11 model but it runs very good in everything I had to do on it like mixing music or stuff that needs a strong enough system .

While I tried to do game development on Unity in 3D I noticed that it lagged a lot .

I see that Macs don't have so strong grafic card as pcs but i love their software and environment.

The question here is, buy a Mac or a pc for game development?