How many bytes are in a Megabyte ?
1024 x 1024 = 1,048,576 bytes ?
1000 x 1000 = 1,000,000 bytes ?
This question/confusion, which seems as old as technology itself, has finally gotten a clear answer.
What is interesting is that very very few people know what a Mebibyte is. Do you?
And what's even more disturbing is that it is only with the latest version of Mac OS X Snow leopard a little bit earlier this year (end of August 2009) that at least one OS is using the correct computations (but not the real nouns) !
It means that a file of 1,000,000 bytes under Mac OS < 10.6 and any other current Operating System (Windows XP/Vista/Seven, Linux etc...) is reported as 976 KB but if you upgrade to Snow Leopard than it suddenly weights "more" : 1.0 MB.
... but dont be afraid, that means that your Hard Drive capacity has increased, too :
A 160 GB hard-drive gives you 152.6 GB under Windows XP but "enlarges" to 160 GB on Snow Leopard.