I help a few friends with their websites to aid my web programming. It’s a constant battle with Browser Updates and Cross OS browsers not to mention Mobile devices. I purchased a Mac purely for testing websites and development on OSX as Chrome on Windows can be totally different to Chrome on OSX especially working with Designers who use Macs!
I recently retired my Mac PC which proved difficult to test OSX on websites now however I just found a cool tool https://www.browserstack.com where you can check your websites in REAL TIME! Across multiple browsers and devices and you get 25 free minutes of first time testing and then 10 free mins each day