If you didn't purchase Snow Leopard, you can't install Lion. Those situations are pretty clear. But what if, for example, you've got a family-pack license for Snow Leopard, and you've got a Mac that shipped with Leopard but that you never upgraded to Snow Leopard?
Assuming that Mac is compatible, the Lion license agreement says you can't upgrade to Lion until you first install Snow Leopard. This is just one scenario--I can think of a number of situations in which you might have Leopard on a Mac or an external hard drive, along with a valid license for Snow Leopard, and you'd rather not take the interim step of installing Snow Leopard just to upgrade to Lion.
Having performed this two-step upgrade many times while researching our various Lion-installation articles, I can tell you that it's a real hassle. But lets take a step back. While the letter of the law says you need to install Snow Leopard before installing Lion, the spirit of the law seems to be that a particular Mac just needs a license for Snow Leopard before you can install Lion on it. In other words, in our view, you should be well within your rights to install Lion on any of your computers for which you have a valid, current Snow Leopard license--even if you don't install Snow Leopard on it first.
So then the question becomes whether there are any technical reasons you can't install Lion over Leopard. Based on our testing, the Lion installer refuses to install Lion onto a drive containing Leopard It will, however, install onto a blank drive, so Lion clearly doesn't need any of Snow Leopard's files or settings.
You may be thinking, "It will install onto a blank drive? MacBook Late Aluminum, or Early or newer 3. MacBook Air Late or newer 5. Mac mini Early or newer 6. Mac Pro Early or newer 7. Xserve Early Are my applications compatible? Am I eligible for the free upgrade? Model Eligibility for Snow Leopard and Lion. Snow Leopard General requirements 1. Mac computer with an Intel processor 2. DVD drive for installation 5. Some features require a compatible Internet service provider; fees may apply.
Lion System Requirements 1. OS X v After spending over 20 years working with Macs, both old and new, theres a tool I think would be useful to every Mac owner who is experiencing performance issues. CleanMyMac is highest rated all-round cleaning app for the Mac, it can quickly diagnose and solve a whole plethora of common but sometimes tedious to fix issues at the click of a button. It also just happens to resolve many of the issues covered in the speed up section of this site, so Download CleanMyMac to get your Mac back up to speed today.
I've been passionate about Apple ever since I bought my first iPod followed by a white polycarbonate MacBook in Roland's Google Profile. This site uses Akismet to reduce spam. Learn how your comment data is processed. Hey, nice write-up. Helps a lot! I was just wondering though, I have never attempted to re-install the OS and I am worried about loosing programs like Photoshop and that. If I do method one will I loose programs, or just the files like photos and documents.
Great article! After reading conflicting blogs with personal opinions, I appreciate your step by step no nonsense approach. It worked for me and I got my files back locked out by Lion. Here are some of the alternative ways to revert from Lion to Snow Leopard.
Before you go After spending over 20 years working with Macs, both old and new, theres a tool I think would be useful to every Mac owner who is experiencing performance issues. You may also like. OS X No more autocorrect slip-ups! About the author. View All Posts. Click here to post a comment. Leave a Reply Cancel reply.
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