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!!

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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/

I'm using a late 2006 2.33GHz imac.I clean installed 10.6 from disc then updated to 10.7 from download.Now every time my computer goes into sleep it won't wake up.Anyone know how to cure this problem please??

I'm using a late 2006 2.33GHz imac.
I clean installed 10.6 from disc then updated to 10.7 from download.
Now every time my computer goes into sleep it won't wake up.
The only way it will restart is to pull the mains lead out of the imac, put it back and try until it will start.
This only happened after reinstalling. Only Apple OS was on the imac and so it must be an issue with the software I believe.....
Anyone know how to cure this problem please?
Thanks
paul

This isn't a fix, more a workaround I used when I had wake from sleep problems that lasted from some point in 10.6.x, through 10.7 and into 10.8 (got fixed for me in 10.8.2). It seems to be connected with Bluetooth failing to wake up properly:
System Preferences>Energy Saver and set 'computer sleep' to 'never'.

Clean install and restore from Time Machine: Will i lose my applications ?

I want to do a Snow Leopard clean install instead of a an upgrade.
1) How do I do the clean install and restore it from Time machine during the install ?
2) If I do the clean install and restore from Leopard's time machine backup, will I retaing all my applications or I will only retain my personal files ?
- If I don't retain my applications, how will my photos in iPhoto be restored without iPhoto ?

If you did a complete TM backup, then all your files, users, settings, and programs will be restored. You will have the opportunity to restore using TM at the end of the install. I would back at least my data up separately.
To erase and install (i.e., clean install), start up to your DVD and stop after selecting your language. Use the menus to start Disk Utility and erase your drive. Quit Disk Utility and proceed with your installation. At the end, you will be able to choose to reclaim your settings, files, and apps from TM.
Message was edited by: donv (The Ghost)

Clean install of Mavericks from Recovery Partition

Can you do a clean install of Mavericks from the Recovery Partition (cmd+R on boot)? Or do I need to put in the DVD that came with the 2010 MacBook Pro, boot to that, reformat drive, and install/upgrade from there?
Yes, I know you can make a USB boot drive (which I don't have). Can I boot to the recovery partition, reformat the drive, and then install Mavericks from there? Or will there be other issues? I do not want to restore from a Time Machine drive (which is also on the fritz), I want a clean install. Thanks.

To 'clean install' you need to erase the partition for OS X…
Boot into recovery mode.
Select Disk Utility from the options list.
Select your boot disk in the left sidebar and then find the desired partition (these are indented below the disk icon).
In the erase tab, erase the OS X volume and format the new partition as a 'Mac OS Extended (journaled)' volume.
Quit Disk Utility & select the installer from the main screen.
I'd strongly suggest you backup all the other OS's before you begin since it is possible to erase the wrong partition!
The installer will be downloaded from Apple so you should use a wired connection if possible - wifi can be slow & unreliable, it will save time if your internet connection is faster than wifi.

Could someone help me with instructions for doing a clean install for iMac with mountain lion 10.8.4 ?

   Could someone help me with instructions for doing a clean install for Could someone help me with instructions for doing a clean install for an early 2009 iMac 20" with Mountain Lion 10.8.4 ?
   Thank You,
                            leetruitt

   Barney, William, nbar, Galt\'s Gulch:
   A nephew stayed with us to take a course at the local community college last semester. I allowed him use of my mac for research just after I installed Mountain Lion. He decided to "help out" and ran a 3rd party clean and tune up app., Magician. The tune up wiped over 1200 titles of my music in iTunes, also a path of folders with names containing nothing but more empty folders with names. Almost every program I open and run for a short time crashes, also folders and programs are in wrong places, or cannot be located (the nephew, for instance). Up to this time I have always been able to track a problem far enough to resolve it by careful persistence and good luck, but I do not have the tech savvy to solve this one without getting in deeper. I have run disk utility saveral times and always get variations of this:
ACL found but not expected on
"private/etc/resolve.conf"
"private/etc/raddb/sites-enabled/inner-tunnel"
"private/etc/rabbd/sites-enabled/control-socket"
     Also, after four years of intense daily use it is cluttered with much junk, and every app that I was curious about, and I am a very curious guy.
   So I know my limits, (and now my nephew). I dumped my pc for a Strawberry iMac a few years ago, and so far every problem I've encountered, or brought on myself, the Mac has resolved with its own inner elegance - in spite of my novice bungels - and now I honestly feel ashamed, in addition to the need to apologize to a machine for allowing a peasant into the Royal Grounds - so I am calling the Wise Ones in for this one.
   Crazy, I know, but to me a Mac represents something far beyond the ordinary input ➛ process ➛ output title/function customarily assigned to a machine - I sense an odd kind of morality involved, one that I need to respect.
    So, these are my reasons for wanting to do a clean install, correctly.
        Thank you, Truitt

Clean Install and Restore from Time Machine

Hi All,
Just after some advice, I'm thinking of doing a clean install of OS X when Mavericks comes out. I've been a Mac user for 13 years and have always used Migration Assistant to move my data over whenever I've bought a new Mac. I've never done a clean install before, but I've noticed over the years all the crap that's floating around my hard drive from old Mac's and various files from software I've removed years ago. I'm sure there's tons of rubbish that's accumulated over the 13 years.
Someone suggested clean installing OS X and then using Migration Assistant to load all my data back on from a Time Machine backup, but customise what I want to restore. I was told that if I don't choose to restore System Settings or something similar then it should just restore all my other stuff such as apps, files, itunes and iphoto library, etc. but would leave out all the rubbish. Is that the case?

TJ Skywasher wrote:
Someone suggested clean installing OS X and then using Migration Assistant to load all my data back on from a Time Machine backup, but customise what I want to restore.
Largely agreeing with baltwo, it's probably not worthwhile.
I was told that if I don't choose to restore System Settings or something similar then it should just restore all my other stuff such as apps, files, itunes and iphoto library, etc. but would leave out all the rubbish. Is that the case?
No. If you transfer everything with Setup Assistant when the Mac first starts (preferred), or Migration Assistant later, and leave everything selected, it will transfer everything except OSX (which you just replaced) -- all your apps, user home folders, data, settings, etc. There's rarely a point to that.
With either Assistant, you can omit some broad categories of things, but you can't "pick and choose" individual items even if you knew which ones you wanted. See Using Setup Assistant on Mountain Lion or Lion. Read the first few paragraphs, then scroll down to the Transfer Your Information windows and the pink boxes below them for details. The windows and procedures for Mavericks may be somewhat different, but functionally the same.
If your Mac is just full of junk, be sure it's well backed-up just in case, then delete what you know you don't need.
If it's sluggish, after trying everything else, as a last resort you might want to do a clean install transferring everything except apps, then reinstall the extra and 3rd-party apps you want from the original discs or re-download them. If you have a lot (you probably have more than you think), that can be a daunting task. You''ll also need the serial numbers / purchase keys for them.

Doing a clean install/upgrade, restoring from TM Backup

I am going to do a clean install of Mountain Lion on my iMac, currently running Lion. After I do a clean install of Lion, can I then restore settings and applications from the TM backup made before the upgrade or will this overwrite newer files created by the Lion clean install?
Salnews

If I understand correctly a clean install wipes the hard drive which is my intent. Merely installing Mountain Lion over Lion is not going to clear unwanted apps, etc.
I believe I found my answer elsewhere which states it would be better for me to reinstall apps rather than restoring from Time Machine backup since I would be copying some stuff I'm trying to get rid of.

How to revert back to Lion from Mt. Lion

I have a 2009 IMac. I have no problem upgrade from Lion to Mt. Lion. The only issue I have is the IMAC is very very warm, 55 degree on CPU and between 65 to 70 on GPU diod. I want to revert back to Lion which I paid and downloaded in 2011. The App store would not let me redownload again said that I have a newer system. Since I downloaded the Lion, I do not have any installation disk for Lion.

You need to first erase the hard drive:
Install or Reinstall Lion/Mountain Lion from Scratch
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard 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 startup volume (usually Macintosh HD) from the left side list. 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/Mountain Lion: Select Reinstall Lion/Mountain Lion and click on the Install button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

How to tell if Yosemite is clean install or upgrade from previous version

My brand new MacBook Pro arrived last week, with Yosemite already installed on it.
Having issues with WiFi (after coming out of sleep mode, mbp keeps its self-assigned address rather than getting an address though DHCP or using its old address), I was searching for support on the matter, and one of the solutions often suggested was doing a clean install of Yosemite if the mbp was upgraded from 10.9.
Seeing that the mbp arrived with Yosemite pre-installed, I'm guessing that it is a clean install, but I'm not sure.
I wonder if there is a way in telling if the OS was upgraded to the current major version, or if it's a clean install? Even if Apple only ships clean installs, it would be helpful to know if I need to give support to one of the mac-users in our company if it's a clean install or not.

On my system, the Yosemite upgrade (performed on Oct. 23) left quite a bit of residue that would not be present after a clean install. The most obvious examples are in /var/db/receipts, which contains BOM files for all of the software installed via the Mac OS installer, e.g.,
-rw-r--r-- 1 root wheel     98584 Oct 20 08:49 com.apple.pkg.update.lion.appstore.155-2.bom
-rw-r--r-- 1 root wheel       563 Oct 20 08:49 com.apple.pkg.update.lion.appstore.155-2.plist
-rw-r--r-- 1 root wheel     81657 Sep 29 17:13 com.apple.pkg.update.os.bash.lion.1.0.163-3.bom
-rw-r--r-- 1 root wheel       279 Sep 29 17:13 com.apple.pkg.update.os.bash.lion.1.0.163-3.plist
-rw-r--r-- 1 root wheel     80653 Aug 12 13:34 com.apple.pkg.EPSON_USBPrintClassSL.bom
-rw-r--r-- 1 root wheel       472 Aug 12 13:34 com.apple.pkg.EPSON_USBPrintClassSL.plist

Clean install of ML from bootable disk, Snow Leopard original OS...

Hi all,
I visited my apple store on Sunday who suggested I should reinstall my operating system from scratch.
My MBP is 2009 and I believe came with Snow Leopard installed on it. I have the original disks that came with it to do a fresh install of Snow Leopard, however I am currently running ML.
Do I need to install Snow Leopard, then Lion then upgrade to ML again or can I just boot and do a clean install straight from the USB?
Any help would be appreciated
Thanks,
Sarah

Do I need to install Snow Leopard, then Lion then upgrade to ML again?
No, it's on a bootable partition now called Recovery HD, hold command r and boot the machine, use Disk Utility to erase the Macintosh HD partition (all files, programs and OS X will be gone) reinstall OS X, you will need a fast internet connection and your AppleID and password.
https://support.apple.com/kb/HT4718
If you don't have a backup, need to perform data recovery BEFORE erasing or reformating the Macintosh HD partiton, then do this, just because OS X isn't booting means you can't access the drive and grab files off.
Create a data recovery/undelete external boot drive
You might be able to fix your problem in place, without a messy erase and install, that's a last option in my book
Run through this and see if it clears your issue, or least gets OSX to boot so you can copy files and important information off first.
Step by Step to fix your Mac
If you have a boot hard drive, when you erase the Macintosh HD partition, use the Security > Erase middle selection as this will improve the drive's data retention. SSD's no need and it's not available.

Doing a clean install of W7Pro from XP. How to save and re-install my FF settings

Hi
1st question. Is it ok to use XP after Microsoft stops support. What's the danger, if any. How do I keep it safe. Will virus and malware protection be enough. Some computer experts say it's ok to keep using it for at least a few years.
If I update the OS, it will be to Windows 7 Pro with a clean install. I will need to backup my important stuff. As far as FF goes, I will have to re-install it so how do I save all my FF settings, bookmarks etc and re-install them.
Thanks
Steve

Firefox Profiles - Where Firefox stores your bookmarks, passwords and other user data
Profile Backup and Restore
*http://kb.mozillazine.org/Profile_backup
*https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
More about Profile
*https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data
*https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_Manager

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

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

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

Clean instal Mountain Lion - from mountain lion

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