Originally Posted by gdog
did not mean ios. want to know if i need newer mac to gain benefits of lion. current system runs well and i prefer not to have slower imac with update.
If your system has an Intel Core Solo or Core Duo CPU (32-bit), yes, you must get a newer machine. If you have an Intel Core 2 Duo (64-bit), you will be fine.
If you have a Intel Core 2 Duo Merom CPU, you may need to default to the 32-bit kernel in Lion, but you can run either 32-bit or 64-bit apps fine. I don't have the preview of Lion, but from what I have read, I am pretty sure this is true. This is the type of CPU in my mid 2007 iMac.
If you have a Core 2 Duo Penryn (early 2008) or later CPU, you can use the default 64-bit kernel in Lion, and you will be fine.
The best thing to do is to wait until Lion is released, then go to Apple.com and check the specs for Lion. To find out what CPU you have, click on 'Apple' in the upper left corner of the screen, and then click on 'About This Mac'.