How to downgrade from Mountain Lion to Leopard/Snow Leopard

what I got for buying the new Macbook Pro was a VIRAL SCRIPT, loss of all my TRUSTED CERTIFICATES, and I feel the way I felt when I had internet explorer /windows "LIKE AN OLD GRAYING WORRY WOMAN, I got my white macbook, and felt like a new woman, then when I bought a new fancy macbook pro, 2 1/2 years since I'm back to AN OLD GRAYING WORRY WOMAN, so I took my white macbook out, and she's made me feel so much better, and much much safer beleive me keep your old stuff, don't be fooled or lured to go to africa with SAFARI, find a safe comfortable snow leopard and get your sanity back!

I think this might be more user error than anything else. Please excuse me for saying that, First of all what viral script? Secondly Mountain Lion run svery smoothly, it has better inbuilt security than Snow leopard, of course it depends on what you do, but sometimes people dont like change, maybe if you explained yourself rather than posting in uppercase which is like shouting you may get help. Also if you had a backup you could have reinstalled what you lost from Time Machine, if not just reinstall your whole Mac to a date before this happned. Dont blame an OS when it sounds more like user error.

Ok Killhippie, I definitely have a VIRUS on my MacBook Pro and my friend who has the same computer as mine told me he also got a very bad VIRUS on the same computer its his, I don't communicate on the web at all with him, but in person, and THIS VIRUS is NASTY. I don't feel the safety anymore from having a Macbook...... I am shocked but since Apple has grown so big so fast, now they are the same as WINDOWS. I'm MAD, I'm going to Genus Bar tommorow with both of my macbooks, and I want my money back for a full refund on these so I thought Top of The Line, worry free, anti virus secure apples, NOT ANY MORE, I boughjt them with that description being the SOLD ME ON. Now I've got an over priced lap top that is no better than a SONY VAIO, ETC.

If you had the new MacBooks for longer than 14 days, you have forfeited your right for a full return and full refund.

And I really doubt your MacBook has a virus.

Unless, of course, you are running Windows on a Mac, then you may, indeed, have a a Windows virus.

There are lots of Trojans and various malware on OS X, but not a lot of actual viruses.

If this was such a "NASTY" virus as you have called it, it would've already been found, recorded/exposed, documemted and posted as new Apple news on every Apple related website! There have been some exploits/viruses that were documented as being transmitted through web browsers using Java, but these have been well documented and Oracle ( who owns Java) have been doing their best to plug these vulnerabilities.

Anyhoo, how do you know for sure you have a Mac OS X virus and how did you come to that conclusion?

You have a year of free AppleCare and service, so you might as well have the geniuses look over your MacBook and they will determine if you have an actual virus and if yes, they will correct the issue and if no, they will get to the root of your MacBook issues and also repair this at NO charge.

Here my tidbit of advice on how to avoid viruses in the future, if you encounter a virus, again.

Some anti-virus solutions can slow down your Mac, but to be honest, the best anit-virus app is you, the user and your brain.

• Don't visit questionable websites or website you are unsure about.
• Don't install pirated software or software downloaded from a questionable or unknown websites or untrutsted sources.
• Java is a vulnerability right now, if you do not need it, don't use it.
• Use a browser filter and pop-up blocker
• Don't open email attachments from email addresses that you do not recognize.
• Install security updates when they become available
• Educate yourself as to what threats are common and active.
• In effect, use your own brain as the antivirus filter.

Follw that advise and in MOST cases, you will be fine and won't risk your Mac to potential Trojans, malware or viruses.

I wonder what her outcome was? Looks like she never posted again regarding this subject. I want to try the same thing with my 2011 27" iMac that I just bought refurbished from Apple. It has Mountain Lion and I want to be able to run Snow Leopard as I have lots of investment in Adobe CS2 and other Power PC software.

Question: is it ok to use a Firewire external drive for the Snow Leopard start up drive?

What OS X version was installed on your iMac when you purchased it?

According to everymac.com original was 10.6.7

I just bought it refurbished and it has 10.8

You could do as I did.

I purchased a FireWire 800 external drive, you can use a data cloning app, like CarbonCopyCloner or SuperDuper, to clone your entire OS X Mavericks system and all of your important data to the external drive and then erase and reformat your iMac's internal hard drive and run OS X Snow Leopard on your iMac's main internal drive and do a fresh reinstall of all your primary applications.