Then saw that two weeks before end of quarter they started a “back to school” promotion (in June?) that throws in a free pair of AirPods with a Mac or iPad purchase. Details here: https://www.apple.com/promo/pdf/EN_US_BTS_FY20_TandCs.pdf
With a $479 iPad Air that’s 33% of the price of your purchase.
New Apple products can easily be sold on Amazon or Ebay for close to face value, so this is a extremely easy and generous retail arbitrage opportunity.
My point is I didn’t see any language around this promotion in their earnings report but suspect because it is so generous that both legitimate customers and resellers are taking advantage of this deal, thus disproportionately lifting sales for Macs and iPads vs other categories like iPhones which was essentially flat YoY.
Their surprise beat was then in part influenced by this big promotion and not necessarily totally organic demand...
Edit: They do something like this every year but this one started in Q2 unlike last year in Q3 and includes much cheaper iPads, and is for Airpods for the first time (a much more desirable freebie over Beats)