[glvn]

Back in 2012 I had a white MacBook. Apple said it only officially supported 4GB butt there were numerous reports of people getting it to recognize 8GB without issue. Back then I was still in high school and only semi-technical so I thought it was some sort of black magic.

[bluedino]

The white polycarbonate MacBooks only supported 8GB according to Apple, but 16GB worked fine. Same thing with the 2010+ 13" Unibody MacBooks

[unpixer]

Gather 'round, young 'uns: the 1998-vintage Powerbook G3 "PDQ" officially supported only 192 MB of RAM. Unofficially it was possible, if you bought the right DIMMs, to upgrade it to 512 MB. Which I did, just for laughs. (It was also possible, using XPostFacto, to upgrade it past the official OS X 10.2.8. maximum to 10.4.11. But it was so slow it was practically unusable.)