how do I know if can upgrade my computer to lion
I am running MacBookPro Leopard version 10.5.8, 2.5 GHZ Core 2 Duo, Memory 2 GN 667 MHZ DDR2 SDRAM. Can I upgrade this machine to Lion?
MacBookPro, Mac OS X (10.5.8)
Lion/101.7 System requirements
• x86-64 processor (Macs with an Intel Core 2 Duo, Intel Core i3, Intel Core i5, Intel Core i7, or Xeon processor.)
• At least 2GB of memory, (I say 4GB)
• Latest version of Mac OS X Snow Leopard (10.6.8), with the Mac App Store installed
• At least 4GB of disk space for downloading, (I say 40GB at least)
Like Snow Leopard, Lion does not support PowerPC-based Macs (e.g., Power Macs, PowerBooks, iBooks, iMacs (G3-G5), eMacs).
Lion also does not support 32-bit Intel Core Duo or Core Solo based Macs. Rosetta is no longer available in Lion, which means Lion no longer supports PowerPC applications.
It looks like Apple will have Lion available on USB drives for $69...
The Flash drive would require erasing before installing, & for $10 less you can buy 10.6 & download 10.7...
You'll need to buy SL/10.6 first & get it to 10.6.8, then get Lion... if you can run it.
Snow Leopard/10.6.x Requirements...
General requirements
* Mac computer with an Intel processor
* 1GB of memory (I say 2GB at least)
* 5GB of available disk space (I say 30GB at least)
* DVD drive for installation
* Some features require a compatible Internet service provider; fees may apply.
* Some features require Apple’s MobileMe service; fees and terms apply.
Which apps work with Mac OS X 10.6?...
http://snowleopard.wikidot.com/
It looks like they do still have it: