How do I uninstall Mountain Lion

I'm a new user to Mac, a convert. Got the new MacBook Pro Retina a month ago and it is amazing, super fast.
However, I have upgarded to Mountain Lion and it is drains my battery like nothing normal. The percentage of the battery drops almost like the minute so I want to get rid of Mountain Lion as this issue did not occur prior to its installaton.'
Thanks,
Adi

This is a major problem for many people. A big thread on it here; It needs a fix;
https://discussions.apple.com/message/19015287#19015287

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How do I uninstall mountain lion and reinstall snow leopard

If I had known that I would not be able to use my excel files I would not have purchased OSX Mountain Lion. Is there a way to uninstall mountain lion and reinstall snow leopard?
Thank you,

To get more to the point the answer is the only way to go back to SnowLeopard is if you have a complete backup of your system from before the upgrade.
If you do you would boot off your original SL DVD wipe the disk and install SL and then restore from your SL backups.
Short of that here is no way to go back. But as the others have offered there are other less drastic means to deal with the problem.
regards

How do I uninstall Mountain Lion and restore the prior program?

I am having too much trouble with my iMac since purchasing and downloading Mountain Lion. Can anyone give me simple directions on how to uninstall the OS and revert back to the prior program. I am not a computer savant! thanks

Unfortunately, installing a previous version of OS X is not simple. It might be easier to try to address the issues you're having with 10.8 - if you can explain what's happening, we can try to help.
Matt

How do I uninstall mountain lion and go back to lion, how do I uninstall mountain lion and go back to lion

Please help!!! I dont like it!

The installer may do squirrelly things in an upgrade like nip and tuck the code, turning Lion into Mountain Lion. The best option is to do a fresh install. Do a Time Machine backup of your files (you can probably exclude the system folder and apps - just download them again from the App Store). Concentrate on your home folder - iTunes files, your library folder, iPhoto library, etc. Re-download Mountain Lion from the App Store. If the installer starts, quit the app. Now go to your Application folder and find the Mountain Lion installer. View the contents of the package and go to Contents:SharedSupport:InstallESD.dmg. Drag the .dmg file to your desktop or someplace else convenient. Next, open Disk Utility and burn the disk image to an 8 GB DVD or flash drive. If you burn it to a flash drive, you may get an error saying the burn failed. If it burned for a while, long enough for the image to actually copy over, ignore it. Reboot your Mac whole holding down the Option key with the flash drive in a USB port or DVD in the drive. You should get the option to boot from that drive. Select the Mountain Lion DVD/USB option to test the boot. You can then either continue the installation or quit the installer until you're ready.
If you purchased Lion from the App Store previously, there doesn't seem to be a way to download Lion within Mountain Lion. You may have a friend with either Lion or a newer Mac with Snow Leopard installed, if so, you may want to login to their App Store, download it, and try to install Lion that way. If you bought your Mac with Lion preinstalled, you won't be able to download Lion at all.

How can I uninstall Mountain Lion and go back Lion?

I have tried everything. My MacBook Pro is just not the same since ML. I want to get rid of it and go back Lion. What is the easiest way to do so?

Clearing cache is a poor thing to do to improve system performance.
In fact, when you clear cache you actually slow your system down until cache is reloading again.
Yes, it is true cache can get corrupt and have to be cleared. This happens so infrequently that it is almost never a required solution unless you have problems that are specific to corrupt cache.
By the way why are you replying to my post when in fact your comments have nothing to do with my post at all.
Allan

How do I uninstall mountain lion and go back to snow leopard?

I've got a time machine backup that I can use.

How to revert your Mac to Snow Leopard
For Snow Leopard Speed Freaks

How can I uninstall Mountain Lion?

Unfortunately, I've downloaded and installed ML yesterday and now my safari is very slow in opening pages and I can not open iPhoto. I wish to revert back to the Lion OS.

There is an update to iPhoto in the App Store and and here: http://support.apple.com/kb/DL1562. There a number of reasons Safari might be sluggish. Are you running Anti-virus software? What extensions if ant are you running. What plugins have you added to safari if any?

How do uninstall Mountain Lion OS

How do I uninstall Mountain Lion and go back to Snow Leopard

Downgrade Lion/Mountain Lion to Snow Leopard
1. Boot from your Snow Leopard Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Click on the Partition button and wait until the process has completed.
4. Quit DU and return to the installer. Install Snow Leopard.
This will erase the whole drive so be sure to backup your files if you don't have a backup already. If you have performed a TM backup using Lion be aware that you cannot restore from that backup in Snow Leopard (see below.) I suggest you make a separate backup using Carbon Copy Cloner 3.4.1.
If you have Snow Leopard Time Machine backups, do a full system restore per #14 in Time Machine - Frequently Asked Questions. If you have subsequent backups from Lion, you can restore newer items selectively, via the "Star Wars" display, per #15 there, but be careful; some Snow Leopard apps may not work with the Lion files.

Uninstall mountain lion and reinstall lion

how can i uninstall mountain lion and reinstall lion please i have no disks

https://discussions.apple.com/docs/DOC-1948

How to uninstall mountain lion

How to uninstall mountain lion?

Backup your files, erase the hard drive, install an earlier version of OS X.
Downgrade Lion/Mountain Lion to Snow Leopard
1. Boot from your Snow Leopard Installer Disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Click on the Partition button and wait until the process has completed.
4. Quit DU and return to the installer. Install Snow Leopard.
This will erase the whole drive so be sure to backup your files if you don't have a backup already. If you have performed a TM backup using Lion be aware that you cannot restore from that backup in Snow Leopard (see below.) I suggest you make a separate backup using Carbon Copy Cloner 3.4.1.
If you have Snow Leopard Time Machine backups, do a full system restore per #14 in Time Machine - Frequently Asked Questions. If you have subsequent backups from Lion, you can restore newer items selectively, via the "Star Wars" display, per #15 there, but be careful; some Snow Leopard apps may not work with the Lion files.

So I just got OSX Mavericks... Do I need to uninstall Mountain Lion now to free up space?

My memory clean application is telling me my memory is low after installing Mavericks. I want to uninstall Mountain Lion if possible. How would I do that?

Memory is different from storage space. If you ran through the upgrade process then Mavericks was installed over Mountain Lion. Open Applications>Utilities>Activity Monitor and select Memory. Something is using up your memory and this is a way to find out what application or process is the culprit.

How do you erase mountain lion to install snow leopard?

Hi, My mother now has a new to her late 09 mini that originally shipped with snow leopard. When she bought it it came with mountain lion preinstalled from a private seller. We were thinking that to be on the safe side that it might be better to erase and install what's on it just to be sure it is secure. I tried to erase and install snow leopard from a disk but it says that the installer is not compatible with this version of osx(mountain lion). Question: How do I erase mountain lion and install snow leopard?
I've read here that there is possibly a built in recovery disk that I can use to erase and reinstall mountain lion. Q: Is there a built in recovery disk available in my situation? and if so should I use it or be even safer by installing snow leopard instead?
Thank you,

I think I found the answer (from sl install disk use disk utility to erase then install sl). Thanks for looking.

I do not have a high speed internet connection. How can I get Mountain Lion on a disk for install?

I do not have a high speed internet connection. How can I get Mountain Lion on a disk for install on my 24" Imac?

As long as you use your Apple ID to purchase it, I don't see why they wouldn't let you download the installer on one of their Macs and put it on a pocket drive.
Or, a friend with a high speed connection?
I agree with you about the delivery method, just trying to help you get what you want.

How do I redownload mountain lion for a clean install on the same machine without purchasing again?

I purchased mountain lion and upgraded my OS. The system seems to still be having some issues and I'd like to do a clean install with the new OS. How do I redownload mountain lion so that I can make a bootable disk and do my clean install?

You should be able to just go to the App Store and select Download again. If that doesn't work, try holding down the option key while selecting "Buy".
Good luck,
Clinton

Hi, I have a late 2008 iMac with a new hard drive. How do I install Mountain Lion from my bootable USB flash drive.

How do I install Mountain Lion to a new hard drive without having the recovery partition on it.
I have the USB flash drive with software on it but when I switch my Mac on all I have is a white screen & a flashing question mark.
ATB,
Steve.

Did you use LionDiskMaker or DiskMaker X?
Boot the machine with the option key down until you see your bootable USB stick. Select the latter, and reboot.
When the installer boots up, you will first need to choose Utilities and Disk Utility. Select the target HD device name and then the partition tab. Select 1 partition, name it Macintosh HD. Format is Mac OS Extended, and option is GUID. Apply. Exit Disk Utility and return to the installer, which will now show your newly partitioned HD as available for install.
When OS X is installed and all updates applied, press shift+command+U and run disk utility again. Verify/repair permissions and verify the boot disk.

How do I uninstall Mountain Lion

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