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

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I have installed mountain lion on my macbook pro ,but it made my mac very slow. Would someone please tell me how to uninstall this one and reinstall snow leopard?

Hello,
I have installed mountain lion on my macbook pro ,but it made my mac very slow. Would someone please tell me how to uninstall this one and reinstall snow leopard? I tried to do it by my original CDs but macbook pro didn't let me to do it.
Thanks

It would be easier to just fix whatever is making your machine slow.
I wrote a little diagnostic program to help show what might be causing these problems. Download EtreCheck from http://www.etresoft.com/download/EtreCheck.zip, run it, and paste the results here.
Disclaimer: Although EtreCheck is free, there are other links on my site that could give me some form of compensation, financial or otherwise.

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

HT4718 I had a copy of Mountain Lion on my late 2008 MacBook Pro, having replaced Lion which it came with. But the drive,crashed, so I replaced the drive and reinstalled Lion from the original disks I had. How do I get another copy of Mountain Lion?

I had a copy of Mountain Lion on my late 2008 MacBook Pro, having replaced Lion which it came with. But the drive crashed, so I replaced the drive and reinstalled Lion from the original disks I had. How do I get another copy of Mountain Lion?

A 2008 Mac won't have originally shipped with Lion. You need to install 10.6.8 on the computer, log into the Mac App Store with the Apple ID you used to purchase Mountain Lion, click on the Purchases tab, and download it.
(121465)

HT3910 How do I erase Mountain Lion and reinstall Snow Leopard?

Can anyone help me erase Mountain Lion and reinstall Snow Leopard. When I had installed Mountain Lion,I discovered that my music notation program, Overture was not working with Mountain Lion. Please help me, years of work is for now lost.

Back up your data files.
Use the Snow Leopard installer disc to completely erase your hard drive and everything on it.
Re-install the SL operating system, then all your applications, then your data files.
If you happened to make a bootable backup clone of your hard drive before installing Mountail Lion then you can just clone the backup back to your drive.

The iMac is very long (1 Minute) waiting during the programmoperation. I have run the diagnosesoftware and reinstalled lion on my system. .

The iMac is very long (1 Minute) waiting during the programmoperation. I have run the diagnosesoftware and reinstalled lion on my system. It is always the same result. Sometimes the System runs very prober and than he fails very often.

The iMac is very long (1 Minute) waiting during the programmoperation.
You are referrring to how long it takes to startup your Mac?
If so, open System Preferences > General
Deselect: Restore windows when quitting and re-opening apps
And remove any apps in HD > Library > Startupitems
Make sure there's at least 15% free space on the startup disk.
Click your Apple menu icon top left in your screen. From the drop down menu click About This Mac then click More Info then select the Storage tab from the menu.
If you have anti virus software installed, disable or uninstall the software to see if that makes a difference.

Reformated hard drive and reinstalled lion still not able to use lion recovery asst.

I reformated my HD and reinstalled lion 10.7.1 and I am still unable to use the lion recovery assitstance app it's telling me no recovery partion?

I bought an external HDD to install the OS X Lion on it, then reformatted entire Macbook HDD, followed by restore image from external HDD to the Macbook build in HDD.
now the external HDD is a working Lion OX & Macbook also running smooths

I have a mac book pro with Boot Camp that also runs windows. I upgraded to Lion and somehow it crashes the mac side peridoically. I am told I need to "clean" it and reinstall lion using the recovery drive. will that delete the windows partition too??

I have a mac book pro with Boot Camp that also runs windows. I upgraded to Lion and now the mac side crashes/freezes periodically, especially iphoto. I am told by the genius' that I probably need to "clean" it and reinstall lion using the "recovery drive" which resets everything back to default and reinstalls the lion operating system. My question is will this also delete the "windows" partition drive and all that data too. If so that will be a huge pain in the ___ to back up and reinstall boot camp and windows. I want to shoot the lion.

There is no system like Acronis for the Mac platform. You can try using the buiilt in Disk Utility to create an Image of the complete Mac drive but I have found that this does not work very well as on tryiing to restore it gives errors sometimes.
You can use SuperDuper or Carbon Copy Cloner to create a bootable Clone of your system partition. But that is only for the System partition and not the complete drive.
If you use Boot Camp to install Windows on your Mac neither of those two programs will clone the Windows side.
Neither will Disk utility as Mac's can not create or write to a NTFS partition. So some other program is need for that.

How do I get out of kernel panic? kernel panic upon boot. I did that hard drive cleanup and reinstalled Lion. What about memory? Anyone think I need to upgrade my memory? I have 8gig.

I get kernel paic upon boot. I did that hard drive cleanup and reinstalled Lion. What about memory? Anyone think I need to upgrade my memory? I have 8 G of upgraded RAM. (20 inch iMac core 2 duo)

If you're able to boot, launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ If you’re running Mac OS X 10.7 or later, open LaunchPad. Click Utilities, then Console in the page that opens.
Select the most recent panic log under System Diagnostic Reports. Post the contents — the text, please, not a screenshot. For privacy’s sake, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header and body of the report, if it’s present (it may not be.) Please don't post "shutdownStall" or "hang" reports.
If you can't boot in the usual way, try a safe boot. The instructions provided by Apple are as follows:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
During startup, you’ll see a progress bar, and then the login screen, which appears even if you normally log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Safe mode is slower than normal, and some things won’t work at all.
Note: If FileVault is enabled under Mac OS X 10.7 or later, you can’t boot in safe mode.

How to Backup your HD and Reinstall Lion

Hello to all,
I'm a Student of Informatic Engineering studiying at UCAB in Venezuela.
I have a Macbook Pro 13" late 2011 and needed of windows and ubuntu because some projects at University needed to be developed in those OS. I did the Bootcamp to add Windows to my MacBook Pro, and did an extra partition to the Macintosh HD to install the Ubuntu. All Sucess and finished the semester. Now i dont need these OS no more because i won an Acer and now i have Windows and Ubuntu in that laptop so i want my Mac only with OSX. Besides now the OSX is startint to act funny, so i think its about the triple partition (and i dont like my apps in OSX closing for no reason, and the system is getting a bit slow).
So, my question is:
1.- How do i Backup my Macintosh HD so i dont lose all my installed apps and data.
2.- Can i use Time Machine on any External Hard Drive?
3.- How do i clear all my hd so its like brand new, and Reinstall Lion (because when i bought the Mac it didnt came with an OS CD)
Thanks for any help you may bring me..
I'm Sorry for any misspelled word, English is not my main Language.
MacBook Pro 13" (Late 2011)
Specs:
Processor: Intel Core i7 2.8Ghz
Ram: 16GB 1333 Mhz DDR3
HD: 750 GB (Macintosh HD: 550 GB, Bootcamp: 160GB, Ubuntu: 40GB)
Graphics: Intel HD 3000

1.- How do i Backup my Macintosh HD so i dont lose all my installed apps and data.
2.- Can i use Time Machine on any External Hard Drive?
3.- How do i clear all my hd so its like brand new, and Reinstall Lion (because when i bought the Mac it didnt came with an OS CD)
1. Use Time Machine - it's on your Mac.
2. Yes - if the external has enough space.
3. After you back up, use the steps described in this Macworld article to make a clean install of OS X. Basically you reboot while holding down the command and R keys and proceed from there.
http://www.macworld.com/article/1167870/hands_on_with_mountain_lions_os_x_recove ry_and_internet_recovery.html

Trying to erase and reinstall Lion without Apple ID

A while back I bought a MacBook Pro from a friend. It came with a Lion Installation Disk.
I've tried erasing the harddrive, and reinstalling Lion, but now im being prompted to enter the Apple ID that purchased Lion.
Since my friend bought the computer along with Lion using his Apple ID, how do I reset and install Lion without having to enter his Apple ID?
Any help is appreciated.

The important question is, did this machine come with lion preinstalled or was it purchased from the app store?
If it came preinstalled, your friend needs to call apple to transfer the license for the OS to you. If he purchased Lion, the license is not transferable and you will need the original install disks, wipe the drive, install the original OS, and then purchase Lion with your own Apple ID.
FWIW, Lion did not come on a disk.

How do I wipe new iMac (3/2012) H.Drive and reinstall Lion and the preinstalled application?

I just bought a 27" iMac (3/2012) and migrated the data from my Mac Pro into the new iMac. It's now overloaded with the settings and files that I should have just put on an external drive, but I didn't. I want to erase everything and start with what OS and applications when I purchased it. It is running Lion OS X Version 10.7.3. Before the app store I understood how to do this when there was a recovery disc for the OS and Applications but need help on how to get it back to a clean new system (and I do not need to save any settings or information on the new imac).
Really appreciate the help
CJ

Install or Reinstall Lion from Scratch
If possible backup your files to an external drive or second internal drive.
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Erase the hard drive:
Select Disk Utility from the main menu and click on the Continue button.
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 Erase tab in the DU main window.
Set the format type to Mac OS Extended (Journaled.) Click on the Erase button and wait until the process has completed.
Quit DU and return to the main menu.
Reinstall Lion: Select Reinstall Lion and click on the Install button.
Note: You can also re-download the Lion installer by opening the App Store application. Hold down the OPTION key and click on the Purchases icon in the toolbar. You should now see an active Install button to the right of your Lion purchase entry. There are situations in which this will not work. For example, if you are already booted into the Lion you originally purchased with your Apple ID or if an instance of the Lion installer is located anywhere on your computer.

What's the best way to erase and reinstall Lion?

I'm a little confused by the various posts I've read about erasing and reinstaling lion.
My MBP is about 4 years old. I upgraded to lion last summer and it never worked great, but over the last 3-6 months its been dragging. I want to start fresh. I've uploaded all of my personal files to a sky drive and then copied all of my extremely irreplaceable photos to two other hard drives. Now I'm just fuzzy about my next step.
I've read I need to make a boot disk, or a thumb drive or I can do it right from my system. I don't care which way or what I need, but I want it fresh with no chance of curroption.
Thanks for any and all direction.
Josh

While we all have MacBooks in this forum most of us don’t run Lion. There's a Lion Support Community where everybody has Lion. You should also post this question there to increase your chances of getting an answer. https://discussions.apple.com/community/mac_os/mac_os_x_v10.7_lion

Problem earsing HD and reinstalling Lion

Hi,
I've tried to earse my HD and reinstall lion,
pressed command-R on startup and in disk-utility tried to earse.
It bring an error: "Couldn't unmount disk".
Then I've earsed the partition it had successfuly and tried to install Lion.
but when I need to choose HD, the one from before is marked as locked.
I tried to set a partition in the HD and the same error accures: "Couldn't unmount disk".
Help please,
Thanks!

I believe your problem is that you are trying to use the copy of Disk Utilities that is on your Macbook Pro's harddrive to erase the same harddrive. You cannot do that. You have to use either the original CD of your OS to boot from and use the copy of Disk Utilities on that or you can boot from an external harddrive that contains a bootable copy of your current OS and use the copy of Disk Utility from there.
Hope this helps

HELP! How do I remove Lion and reinstall Snow Leopard and my files

HELP! How do I remove Lion and reinstall Snow Leopard & my files BUT I just discovered my Apple Time Capsule which was using Time Machine DIED
I had to go to MacMall and have the Time Capsule data transfered to a new BAK drive($300+$300)
(The Apple Store sent me there as they said they do not do data transfer)
Now what do I do?
? ? One Senior advisor said that I will have to drag and drop the data file or files? from the Time Capsule BAK drive back to my iMAC but will that include all the Snow Leopard operating system ?
? ? Another senior advisor said I will have to wipe my hard drive then install Snow Leopard then "drag and drop", ? ??
All my business leases, database, spreadsheets. letters, mail merge files, and so on are not available with Lion -
I AM VERY ANGRY AS I NEVER SAW THAT WRITTEN ANYWHERE !!!
I am seriously confused and I AM SCARED TO MAKE A MISTAKE-HELP !!
WHAT DO I DO ? AND IN WHAT ORDER? PLEASE HELP!

Your post is confusing to read too.
It sounds like you still have your files on your Mac. Why do you want to back track to Snow Leopard on your Mac? Why can't you read your files from your Mac? If your files are on your Mac, why are you taking them off your broken Time Capsule? You don't have to install Snow Leopard to transfer your files back to your Mac. Maybe step back a bit and explain your situation a little better with details. For instance, what's a BAK drive? Suggest you explain what you are trying to do?
Before you do anything, create a backup of your Mac to another disk drive.. suggest you use Carbon Copy Cloner to make another copy of your Mac.

Uninstall mountain lion and reinstall lion

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