What to know before updating to lion
IMAP e-mail is by default server based, and if you trust your internet provider to back it up, may be a better solution.Moving from POP to IMAP is something you have to do with care, since by default POP is based on storing everything on your Mac.
As of the writing of this FAQ (Frequently answered question page), I've updated every Mac OS X version on an Intel Mac through 10.4.11 to 10.11 using the method of this FAQ.I have a Power PC Mac right now standing at 10.4.8, which I could upgrade to 10.4.11, except I have some old games which won't run on 10.4.11.Just because you've seen an issue which appears on a bulletin board, or is reported to you by a friend in a Mac OS X update, it does not mean the update is itself bad.A mathematical improbability exists to test all combinations of software and hardware compatible with Macs.The fact the update works at all is a testament to how well tested the software is.As a result an update may appear on the surface to be bad, but in reality a contributing factor is causing your problem.
If I had a complete failure with no contributing factors, I'll list it in this update page.
So before you go and blame an update on your problem, try and look for contributing factors, and always backup your data prior to updating.
The steps below should help you avoid the most common mistakes in updating and avoid the most common contributing factors.
Same minimum system requirements exist under Mac OS X 10.8 and later.
i Photo has special notes under 10.10 Notes There are known Microsoft Office issues, addressed by Microsoft on their knowledgebase.
Software tested before that date may not work with the opreating system. issues have been reported on Apple Support Communities.