Can i revert back to lion?, from mountain lion?, happy to wipe the drive, but my disk dont work..

So yeah im not happy with the mountain lion update, i was looking forward to getting it, got it, and i do not like it..
I dont like that the fact they have blocked java applets running and i now can no longer play games, and access some online stuff, i just want lion back ;(,
I am happy to wipe the hard drive as i have backup, however my install disk doesnt work and was wondering if there is a way around this?
Also i have a late 2009 imac

The Java thing is not specific to Mountain Lion. Wen Apple blocks a vulnerable plugin, that affects users of Snow Leopard (Mac OS X 10.6) and up. However, the blockage is easy to get around... Just install an updated version of Java. I've got to warn you, though, that Java has been a repeated security issue, with no less than 7 different malware families in a one year period using Java to install as "drive-by downloads" on the Mac. And you cannot predict what sites will infect you... Some hi-profile sites have been hacked recently, including NBC just recently. Using Java to play games online has become extremely risky, rather like playing Russian Roulette. I wouldn't advise doing that, and would encourage you to disable Java in your web browser.
Beyond that, what problems are you having? For most people, Mountain Lion is far superior to Lion.

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How can I revert to Snow Leopard from Mountain Lion on a 2013 iMac?

I have a brand new 27" 2.9Ghz iMac, bought a few days ago, equipped with Mountain Lion. I'm using it for recording, and at the time, my recording software and hardware are incompatible. On Snow Leopard, however, it all runs flawlessly. I know I can't simply revert to Snow Leopard, as there is some sort of firmware that blocks these types of downgrades. Can I partition the internal hardrive and install Snow Leopard and boot from that partition? I have no real use for Mt. Lion for the time being, so I wouldn't need to boot them both simultaneously or even go back and forth. I just want Snow Leopard...any help would be much appreciated. Thanks

Welcome to the Apple Support Communities
You have different problems with a Late 2012 iMac and Snow Leopard:
1. The firmware doesn't allow you to run it.
2. Snow Leopard isn't compatible because it hasn't got the drivers for the hardware of the iMac. Furthermore, you can only run OS X 10.8.1, 10.8.2 or 10.8.3 on a Late 2012 iMac at the moment, because older versions haven't got the drivers it needs.
3. It's illegal.
As you can see, you can't run Snow Leopard natively. If this is a requirement, I suggest you to return your iMac and search a Mid 2011 iMac with Snow Leopard (there are some Mid 2011 iMacs that came with Snow Leopard, although most of them came with OS X Lion). If you don't find anything, buy a Mid 2010 iMac.
Another possibility is to buy Snow Leopard Server and install it on a virtual machine, but I doubt it's legal

HT1338 How to go back to lion from mountain lion????

Plese explian, How to go back to lion from mountain lion?

Time Machine does not provide bootable backups. Therefore, this is not the solution.
If you bought Lion, you should be able to re-download it from the Mac App Store. (Sadly, Apple pulled the ability to actually buy Lion off the store). You should be booted to another volume other than the one you will be installing to. You may have to disable the installation on the disk you wish to move back to Lion. I'm not certain, but suspect that trashing the ML System folder would do the job. The Installer will probably notice the missing OS and allow the Lion install. If not, then you'd have to go to the root directory of that volume, make invisible files visible and trash the 'Kernel' files and try again to install Lion.
Ideally you can use the Time Machine backup to restore just about everything else. But you may find everything works fine after the install.
I beta tested 10.8 Mountain Lion and know that it had a couple remaining bugs upon release. That's what updates are for. I expect there will be a rapid release of 10.8.1 update via the Mac App Store. It may well be worth hanging in there with 10.8. It is most definitely an IMPROVEMENT over Lion, whose Finder bugs I absolutely hate. (But that problem may soon be solved with the 10.7.5 update coming soon).
If you look around the net you'll find there are instructions for creating a bootable Lion installer DVD or USB thumb drive as long as you have the Lion Installer on a hard drive. Here are a couple with illustrations:
http://osxdaily.com/2011/06/21/mac-os-x-lion-clean-install-explained/
http://mashable.com/2011/07/20/lion-clean-install-guide/

How do I revert to Snow Leopard from Mountain Lion? I do not have the setup disk that came with my MacBook but I do have the Snow Leopard software.

I upgraded to Mountain Lion and very much regret this move. I cannot use Parallels or Bootcamp for Windows XP which I need for some of my 'older' accessories. How do I revert from Mountain Lion back to Snow Leopard? I have the Snow Leopard software but I do not have the original setup software disk that came with the MacBook (leant to a friend and never seen again).

If you do revert to Snow Leopard, be aware of this "feature" I used with my 2009 MacBook Pro:
When it had the original OS (Leopard, I believe) I set up Bootcamp with Windows XP. I also installed Parallels and use the Bootcamp partition for Windows XP within Parallels.
I then upgraded to Snow Leopard and all was fine.
I then upgraded to Lion and still my Bootcamp partition works for Windows XP and also for Parallels.
I have not upgraded to Mountain Lion so I cannot speak to whether or not the Bootcamp paritition of Windows XP will continue to work. If you do and it works, LET US KNOW!

How can I Revert back to IOS7 from IOS8?

Hi Folks,
Is there a way that I can revert back to IOS7 from IOS8 after install on both iPhone and an IPad?
I did not back up either of these devices before doing the upgrade.
I know I should always back up before any updates, but I'm hoping the fact that I did not might be of help in my case.
Any help would be appreciated.
BTW: why do I want to do this? Ever since going to IOS8 my devices have become much slower to start up and also seem jerky during operation.
I have two iPhone 4S's and one iPad

Note that what Allan is suggesting is a way to resolve your issues. It will not downgrade your software version.

How can I revert back to Yosemite from Windows 8.1?

Looks like I've really screwed up this time. I was trying to set up Windows 8.1 on my iMac Yosemite) and decided to use boot camp. After 8.1 was installed I wanted to go back to Yosemite but can't seem to do it. Is there no way to return to Yosemite from boot camp? I know the drive was partitioned into OS X and Windows sections and when I reboot holding down the option key, there is no partition for OS X shown. Please help.

Please see Boot Camp for comments.

HT4718 Hi. Has anyone sucessfully reverted back to Lion from Mountain Lion? Was there anything i need to be aware of? Thanks

The only program i really use is M-Audio Torq Connectiv for djing. Now i've updated to mountain lion this software/hardware no longer works. M-audio arent updating this particular software so i need to revert back to lion....help!!

You can't use the Mountain Lion altered TimeMachine drive with a older operating system version, your files are trapped.
You first need to get back to Mountain Lion, and restore from TimeMachine so you have access to your files.
Next you dig through your files and get to portions that are neutral file formats, like .jpg, mp3, .gif, text, doc etc., and that will work across nearly all computers and operating system versions. You basically want to get your files/data out of proprietary 10.8 program only versions and into something you can manage importing into older versions of programs on the older operating system.
Once that is completed you want to copy all this to a external drive, if you work with Windows, take the new external drive to the oldest Windows machine and right click and format exFAT. If it's a XP machine, there is a free exFAT download from Microsoft to install and reboot first. This way you have the most compatible format for your files possible. The Mac formats exFAT incorrectly and will not work with PC's. If your never going to work with PC's you can format the drive GUID /OS X Extended Journaled in Apple's Disk Utlity. Don't format MBR/MSDOS as that has a 4GB file size limit. Don't format NTFS as Mac's can't write to that.
Once you have all your files off the machine and the external drive disconnected, your now ready to revert back to a older OS X version.
If you originally had Snow Leopard on the machine, then that's the disks you want, even if the machine came with 10.5 or earlier.
How to erase and install Snow Leopard 10.6
Once that is installed, you Software Update fully to 10.6.8 where AppStore appears and you can reinstall 10.7, if it's not there or you upgraded directly to 10.8, then call Apple and order 10.7 and they will send it to you online.
Once your on 10.7 then install your apps and then access your basic files from the storage drive.
The 10.8 TimeMachine drive will somehow have to be erased so it can be setup to be used with 10.7 again, not sure how to go about this as I don't use it, it's terribly limiting for my needs.
If you used a bootable clone for backup of 10.8, you could have avoided all this mess because cloned drives are directly accessible to get at the files from nearly any operating system, unlike TimeMachine which is designed to trap and only move forward with OS X upgrades.
Most commonly used backup methods

Can I revert to Lion from Mountain Lion from Time Machine?

I rushed and downloaded/installed Mountain Lion yesterday, but it's quite buggy for me. This is the first time that I upgrade and am having issues - for instance, the MacBook Pro crashes every time I close the MacBook to put it to sleep - when I open the lid, the system is crashed and needs to reboot. I don't like this at all. This, combined with a bunch of things that I used quite often (like sorting the Documents folder by date - not available anymore, the time left on battery indicator, Office for Mac is now buggy and I am having issues when I type in Outlook, etc), convinced me to try to revert to Lion.
Before upgrading I backed up to Time Machine, and haven't backed up since - which means that the newest backup on Time Machine was done on Lion. I want to restore from Time Machine to go back to Lion. Will I be able to do this, or will I run in any issues? Any suggestions would be greatly appreciated - thank you!
Corina

I rushed and downloaded/installed Mountain Lion yesterday, but it's quite buggy for me. This is the first time that I upgrade and am having issues - for instance, the MacBook Pro crashes every time I close the MacBook to put it to sleep - when I open the lid, the system is crashed and needs to reboot. I don't like this at all. This, combined with a bunch of things that I used quite often (like sorting the Documents folder by date - not available anymore, the time left on battery indicator, Office for Mac is now buggy and I am having issues when I type in Outlook, etc), convinced me to try to revert to Lion.
Before upgrading I backed up to Time Machine, and haven't backed up since - which means that the newest backup on Time Machine was done on Lion. I want to restore from Time Machine to go back to Lion. Will I be able to do this, or will I run in any issues? Any suggestions would be greatly appreciated - thank you!
Corina

If I go back to Lion from Mountain Lion, Can I go back to ML after?

So, I got my 2012 Air with Lion, did a back up and upgraded to ML. I've had it since release and my laptop runs a LOT hotter now and the battery life is much worse. As I have an Android phone and not an iPhone, half the new feature in ML are made redundant to me. This combination has made me want to return to Lion. However, I assume there will be fixes for the high temp and lower battery life down the line, so I was wondering, if I was to return to Lion now, could I go back to ML later when there have been fixes? I also have made a back up of ML.
Any thanks or advice is greatly appreciated by a OS X noob!

Welcome to Apple Communities
To install Mountain Lion, open App Store > Purchases and download 10.8. To install Lion, press Command, Option and R keys in boot, erase the disk and reinstall

How can I switch back to OS X Lion from Mountain lion?

I have a Native Instruments Traktor Kontrol S4, and it stopped working after upgrading to Mountain Lion. Instead of music coming out of the speakers, it is a repetetive crackling noice and the track stops and goes. I just want to downgrade so I don't have to worry about the problem until they come out with an update. I have a performance coming up and I need everything to work! Thanks.

Actually you are right, i ll stay on Mountain Lion. I have a problem with AppStore here is the link of my problem i post it a few minute ago.
https://discussions.apple.com/thread/4276037?tstart=0
I hope that someone can help me to fix it

How to go back to os x lion from mountain lion

os x mountain lion made my macbook pro very slow since i downloaded, how do i go back to os x lion, it is not showing in my purchases. my macbook used to be a pleasure to use before that! :-(

Did your machine come with Lion originally?
If so, you can do it - if not, you can't without a full backup. NOTE: Backup all your files first as you will need to fully erase your drive.
You can use internet recovery (Command + Option + R during restart) to access Apple's servers. Once connected, go to Disk Utility to erase your drive and it will then automatically reinstall the original OS.

HT5957 Can I revert back to ios6 from ios7?

I have downloaded ios7.02, from iOS.6 . I do not like the changes and would like to revert back, is this possible or do I have to put up with ios7?
Colin

You can't downgrade to ios 6.

Can you revert back to ios5 from 6

Hi, I have updated to IOS6 on my iPhone 3G 16gb, but seems very sluggish and slow, did a bit of googling and it seems this can happen on phones lower than 3GS/4G, so, can I safely revert back to IOS5? is this possible.
thanks

No, once Apple releases an operating system update the older versions are removed and inaccessable.

Clean instal Mountain Lion - from mountain lion

Hi all,
I have upgraded my OS 10.6.8 to the last version of Mountain Lion but my computer seems really slow. I used Onyx to clean and try to optimize it but still looks quite slow.. I would like to make a clean instalation to get rid of everything and start back with brand new OS and clean disk.
I have seen some conversation to use a DVD or USB key to do that but it seems it should be done from my previous OS..
Your help is much appreciated ;-)
Thanks

So there is no need to mount it on an USB key than? Everything will be done via internnet so donwloading again (I just finished downloading for the 2nd time) i suppose.
Starting back from this recovery partition, it says "keeping your files and user settings intact", would this anyway clear everything else (any programes, any left register modifications from erased progs, etc)?.
I did a complete back up for all my data so I am ready to erase everything left on the main disk.
Thanks both for your quick answer!!

How to download Lion from Mountain Lion

As I see I have a specific problem. On my old MacBook White (4.1) I have installed Leopard. On MacBook Air I have Mountain Lion, and on iMac I had Snow Leopard and then bought Lion, and I recently upgraded it to Mountain Lion. So… my problem is that I can’t download and install Lion on my MacBook White. It is too old for Mountain Lion and since I have Mountain Lion on iMac and MacBook Air App Store don’t want to download Lion. I have Download button but can’t download it. Since I already paid for this product I don’t see any reason why I couldn’t download it again.

In your iMac:
1. Do a Time Machine backup
2. Open Terminal and write:
cd /
sudo nano /System/Library/CoreServices/SystemVersion.plist
3. Open Finder, select Go > Go to Folder, write /System/Library/CoreServices and copy SystemVersion.plist to another folder
4. Go to Terminal. You will see the file, and you have to change the text with the bold words:
?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs$
<plist version="1.0">
<dict>
        <key>ProductBuildVersion</key>
        <string>11E53</string>
        <key>ProductCopyright</key>
        <string>1983-2012 Apple Inc.</string>
        <key>ProductName</key>
        <string>Mac OS X</string>
        <key>ProductUserVisibleVersion</key>
        <string>10.7.4</string>
        <key>ProductVersion</key>
        <string>10.7.4</string>
</dict>
</plist>
5. Press Control and X keys and save that file
6. Open App Store > Purchases and download Lion
7. Open Finder, select Go > Go to Folder, write /System/Library/CoreServices and move the SystemVersion.plist that you copied to this folder
8. http://blog.gete.net/ldm/Lion_DiskMaker2.0.1.zip
It's very dangerous and only do it at your risk. I don't recommend this

Can i revert back to lion?, from mountain lion?, happy to wipe the drive, but my disk dont work..

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