I think the difference may be that your newer PC has more RAM (short term, fast access memory, most useful for web use) available than your Mac. You can check the difference. I have an elderly MacBook Air but it copes OK as I had more memory included in the build when I bought it.
How do you acknowledge Easter.
Son on rebound - wants to marry
Just how much taxpayers money have the Tories wasted
Water Pollution -“ A National Disgrace”? A case for renationalisation?