Anyone know how to empty the cache on a MacBook Pro? A rep from my bank has advised it as..

[CloudWatcher]

9. Badly worded advice ....

Sorry, but your bank is hiring support people that don't know enough. You almost certainly don't need to delete anything more than your browser (Safari, Chrome, Firefx) caches and cookies. If there's a problem with "your cache" you should be able to just clear your history and cookies. There's a big "Clear history" menu item in the History menu at the top (of Safari).

Of course there's also a very good chance that clearing your cache won't help at all. This is a standard response to queries about problems with their web sites. It's the equivalent of support asking if you've turned off and rebooted your computer to see if the problem goes away.

Unless your disk is has filled up (no free space at all), there's no such thing as the cache being "too full". Omg.

Additional suggestion: if clearing history doesn't help, try a different browser. Poorly supported web sites often don't test enough with (Mac + Safari) and you might have better luck with Chrome or Firefox, as those browsers are on both Mac and Windows.

[me:50+ years doing sofware dev and IT. 20+ years working for Apple software development]