My MacBook Pro (Retina, Late 2013) has been driving me crazy recently. Despite having extremely fast broadband (which even it confirms when I run speed tests) it can be painfully slow at loading web pages on Safari and Mail often complains of a connection error. I've noticed that my iPad Air 2 has no such problems. Indeed, the two of them can be sitting side-by-side, and the iPad will ping to let me know mail has arrived, and the MacBook will sit there grumpily doing nothing. Is my nearly three-year old MacBook just old and past it now? Is there any explanation for this difference in performance? Is it part of some secret built-in obsolescence, designed to make me upgrade?