I own both an imac and a MacBook Pro - do I need to purchase an upgrade for each?

Question

I own both an imac and a MacBook Pro - do I need to purchase an upgrade for each?

Answer 1

Upgrading to OS X 10.7 FAQ
Backup your user files and folders manually (drag and drop) from all partitions/OS's installed to a external powered drive and disconnect this drive, before proceeding in addition to TimeMachine, Bootable Clones etc.
You need to make sure you're running the latest version of Snow Leopard10.6.8
Click the "Apple" symbol in the top left corner of your screen and select "About This Mac."
Make sure you're running version 10.6.8.
If not, click "Software Update" from the same Apple menu and update your system.
Then when that's finished launch the MacAppStore from the same menu.
You'll see the giant Lion banner across the top. Click on it.
This brings you to the app page for Lion. It costs $29.99 -- click the price, then click "Buy App."
Free Lion? check here
http://www.apple.com/macosx/uptodate/
You'll be prompted to sign in with your iTunes ID. After that, yourdownload / upgrade begins.
BackupLion
http://www.eggfreckles.net/tech/burning-a-lion-boot-disc/
http://eggfreckles.net/tech/installing-lion-clean/
Check Apple's license details throughly before usingorinstalling Lion.
This is what binds you legally, notwhat users say or sites suggest you can do.
Other Lion FAQ's answered.
No"Rosetta" sorry. 
Someof your older programs (like Appleworks) that depend upon it will notwork.
OS X Lion cannot be installed on these Macs:
1:Any PowerPC processor Mac (G3, G4, G5)
2:Any Intel Mac on this list:
iMac4,1Early(Jan-Sept) 2006 17"
iMac4,1Early(Jan-Sept) 2006 20"
iMac4,2Mid(July-Sept) 2006 17"
MacMini1,1(Feb-Sept) Early 2006
MacMini1,1(Sept-Aug) Late 2006
MacBook1,113"(May-Nov 2006)
MacBookPro1,115" A1150 (Jan-May 2006)
MacBookPro1,217" A1151 (Aprl-Oct 2006)
MacBookPro1,115" A1175 (May-Oct 2006)
Look under the Apple Menu > About this Mac > More information for you rmachine details.
(there are reports of hacking Lion to work on 32 bit Intel Core DuoMac's, it's unsupported by Apple and not advised)
Didn't get Lion?
These are user to user support forums and Apple doesn't respond here,
We users can't speak for Apple about your free Lion status or problems downloading, reissuing a download.
It's possible Apple could be spacing out the downloads as not to knock theservers offline. So be patient.
If after a week or so when the initial rush is over, and you still haven't gotten your Lion, I suggest you contact Apple.
Mission critical
If your using Mac's in a mission critical type environment or have third party hardware or software you must rely upon working correctly. It's advised to wait until all the bugs, driver updates, third party software and other issues are resolved before upgrading. This might take several months. Then if you do so, do one machine at a time andcarefully test everything before full deployment.