Morning wmc
I found this web site https://discussions.apple.com/thread/8195687 that discusses your issues. Do have a read and see what you think. Download the EtreCheck and run it. them make your own thread and post the results for them to look at and advise. Hope this helps.
P.S Mac is a PC in my book. just a different OS Let us know how you get on
Joss
Current car: BMW X2 sDrive 20i M Sport 5dr Step Auto In metallic Portimão Blue. 04:10:2025
Previous car:Peugeot 308 GT Premium 1.2 Pure tech Petrol.