1 and 2: ‘iPad Air 2’ and ‘iPad mini 3’ with Touch ID & Burst Mode confirmed, show up early in iTunes (9to5Mac — October 2014)
3, 4, and 5: iTunes 12.2 update indicates new gold, dark blue, dark pink iPod nano, touch + shuffle colors (9to5Mac — July 2015)
6. Apple leaks unreleased Space Black Milanese Loop Apple Watch band on Czech store site (9to5Mac — July 2016)
7. Apple accidentally reveals iPhone 7 on Twitter minutes before official launch (The Mirror — September 2016)
8. Images of New MacBook Pro With Magic Toolbar [Touch Bar] Leaked in macOS Sierra 10.12.1 (MacRumors — October 2016)
9. Apple somehow accidentally uploads HomePod firmware that contains glyph of unreleased iPhone (Guilherme Rambo — July 2017)
10. Apple’s iOS 11 GM somehow ends up in the wrong hands, gets sent to 9to5Mac who reveal press render of upcoming Apple Watch Series 3 and several other iOS 11 details (9to5Mac — September 2017)
Tim Cook, 2012: Apple will ‘double down on secrecy on products’
Update 09/09/2017 18:15 ET: Added iTunes leaking the new iPods in July 2015 and the Apple Watch Black Milanese Loop leak, bringing count from six to ten. Tweet me @JackGMarch if I’ve missed any other leaks from Apple!