Better to clean install Mountain Lion?

I have been running OS X 10.5.8 for quite some time now. Lately, I have not been able to save files from Pages or MS word (both programmes freeze) and this soon progressed in not being able to open Pages at all. I have tried everything that I could find on this and other forums (reinstalling iWork; Verifying / Maintenance using Disk Utility and Onyx; Removing .plist files; Checking fonts and emtpying cache). The only thing that seems to work is disconnecting from the internet. Maybe my companies firewall has something to do with this (though my colleagues with newer operating systems are fine). Problems started when I installed the latest version of Adobe Reader (I suspect; removing it did not work).
It seems that I should upgrade my outdated operating system. However, since the easy way to get Mountain Lion is an update I am somewhat afraid that my problems will persist and I am wondering whether I should try a clean install.
Any advice?
(Other ways to solve my freezing problem are also most welcome)

First, check OS X Mountain Lion requirements to be sure you hardware meets the minimum.
My personal opinion is a clean install (fresh install of OS, reinstall apps, restore data) is a good thing to do with a new OS. Others here will disagree and that's fine. I personally feel a clean OS install and reinstall of apps may fix issues that have lingered for awhile. It's also a good opportunity to review apps and only install those you need or use frequently.
Ultimately, it's your choice.

Similar Messages

Is it possible ro clean install Mountain Lion over Mavericks on a brand new mac mini

Is it possible to "clean Install" mountain lion over mavericks on a brand new mac mini

Actually evrything I can find states that the last mini to run SL was 2010.
It appears that the 2012 mini's shipped with Mountain Lion and later Mavericks. Link
Also why would the OP need a bootable SL installation media when they want to install ML?

How can I wipe my hard drive and clean install Mountain Lion?

Hi I have a 21.5 inch mid 2011 iMac running Mountain Lion, I want to wipe my hard drive and clean install Mountain Lion. I dont want all my stuff back, just photos and music, the rest I'll reinstall my self. I also dont have a exteranl harddrive. only two USB's one 2 GB and the other 8 GB. How do I do this? And I dont want to pay for mountain lion again. Thanks!

I made my partition and am currently reinstalling mountain lion to put on my flash drive. I'm using Lion disk maker 2 thats compatible with mountain lion. I'm doing it right, correct?

Will it be possible to clean install Mountain Lion?

Considering it is only going to be available on the Mac App store, will it be possible to clean install Mountain Lion?
Any speculation/inside knowledge would be great!
Ed

Edward McMahon wrote:
Considering it is only going to be available on the Mac App store, will it be possible to clean install Mountain Lion?
Any speculation/inside knowledge would be great!
Ed
Speculation is forbidden on this site. You did read the Terms Of Use before agreeing with them didn't you?
Pete

Clean installing mountain lion while keeping snow leopard?

Hello, I have a question...
I newly buy an SSD and at the same time I am thinking to upgrading to Mountain Lion... My operating system is snow leopard now.
I am thinking to download Mountain Lion and make a bootable flash disk. Then cleanly install it to the SSD. I dont want to touch my Macintosh HD... I am not a good technician... is it possible? I am doing this becuase if I dont like performance of mountaion lion, I will re-install the snow leopard to SSD... is it possible? Or After I boot from SSD, will I able to boot from again Macintosh HD (Snow leopard)??

When asked which drive or partition you want to install Mountain Lion to, pick one other than the partition containing Snow Leopard. The installer won't be deleted from the drive if the installation is done this way; it also won't interfere with the ability to boot Snow Leopard.
(74248)

Just clean installed Mountain Lion but MBP running extremely, extremely slow

Four days ago I opened up my MBP to find it running at a snail's pace. The change had happened overnight. Five days ago it was blazing fast, the next day every application took 20 minutes to start up, the rainbow circle would appear every time I would do the simplest of tasks; it was a nightmare.
First, I thought there was some sort of malware infecting my system, so I scanned the computer with Sophos, iAntivirus and ClamXav. This process took the better part of a day because everything was so slow. The results were all clear. Next, I decided to repair permissions, empty the cache, and use CCleaner. No improvement.
Then, I felt there was a problem with the OS I was running; Lion. So I decided to get Mountain Lion. I took the install DMG file and used Lion Diskmaker to create a USB install disk. I then booted with 'Option', erased Macintosh HD, and installed Mountain Lion. Installation was without any problems, except for the fact that it was quite slow and the Welcome steps also took a very long time to complete, with the rainbow circle constantly appearing.
This now leads me to believe that there might be some sort of hardware issue. If this is so, or if you suspect any other sort of issue, how would I go about identifying and fixing it? Please help, because even typing this problem out has taken me a long time due to the MBP constantly getting stuck and slow-ey.
P.S. I've also noticed that the longer I keep an application running, the smoother it seems to run, but the difference is very small.
MBP 13 inch, Late 2011
Processor: Intel Core i7 2.8 Ghz
Memory: 4GB 1333 MHz DDR3
Graphics: Intel HD Graphics 3000 384 MB
Software: OS X 10.8 Mountain Lion
On the memory slot page, both 2 GB memory slots are said to be in use, so i don't think any memory has been dislodged...
Here is my system log:
http://pastebin.com/EY34q5Bf

Make a "Genius" appointment at an Apple Store, or go to another authorized service center.
Back up all data on the internal drive(s) before you hand over your computer to anyone. There are ways to back up a computer that isn't fully functional — ask if you need guidance.
If privacy is a concern, erase the data partition(s) with the option to write zeros* (do this only if you have at least two complete, independent backups, and you know how to restore to an empty drive from any of them.) Don’t erase the recovery partition, if present.
Keeping your confidential data secure during hardware repair
*An SSD doesn't need to be zeroed.

Transfer individual apps from Snow Leopard to clean installed Mountain Lion

I had a Snow Leopard on Macbook Pro Early 2011.
Took a backup (a clone with Carbon Copy Cloner) of the system and erased my volume to install an SSD and HDD combination, then did a fresh install of Mountain Lion from thumb drive , which I had prepared earlier from an App Store download.
Now installing all applications manually to have it clean. Some apps, though, I cannot do clean install, either because I do not have the original install packs or do not want to lose all my personal data on them.
iLife (Garage Band, iDVD, iPhoto, iMovie, iWeb, what else?)
Mail
iTunes
HOw can I go around bringing these apps from my clone into the new ML ?
I am aware of the option to pay for the iLife apps in the App Store.

macjack's suggestion worked for the iLife apps.
I just ignored the "expired certificate" warning of the Disc 2, "Application Installation Disc" and installed the bundle.
Then without opening them, I went for "software update". Now the App Store allowed me to download the updates. Will take several hours. But I think they are the most up to date versions, so I won't have to pay.
for mail, I followed the below instructions found here (http://forums.macrumors.com/showthread.php?t=1422832)
1) Go to users/Library/Containers/com.apple.mail/Data/Library/Mail
2) Delete V2 folder and copy data you have in SL Mail folder
3) Go to users/Library/Containers/com.apple.mail/Data/Library/Mail Downloads
4) Copy data you have in SL Mail Downloads folder
3) Go to users/Library/Containers/com.apple.mail/Data/Library/Preferences
4) Delete com.apple.mail.plist and copy the same file you have in SL Preferences folder
5) Open Mail

Clean install mountain lion, 3 beeps, restart...

Hi!
I just did a clean mountain lion install on my MBP, and it restarts and beep 3 times and a white screen, I have to remove the battery and turn it back on in order to have access to my session, but it restarts again in less than a couple minutes, I removed one DDR2 2gb RAM and it seems to be fine, but I didn´t have any issue before with my 4gb RAM, I´d really appreciate if you could help me, it says something of ¨panic¨, this is the report:
Interval Since Last Panic Report: 54 sec
Panics Since Last Report:          1
Anonymous UUID:                    00BB5699-9CBB-42F0-9B43-9ABED7E720CD
Fri Aug 31 15:37:02 2012
panic(cpu 1 caller 0xffffff80184876ab): "Spinlock acquisition timed out: lock=0xffffff801bbc28d0, lock owner thread=0x1f0000000000, current_thread: 0xffffff802655f000, lock owner active on CPU 0xffffffff, current owner: 0x1f0000000000"@/SourceCache/xnu/xnu-2050.9.2/osfmk/i386/locks_i386.c:363
Backtrace (CPU 1), Frame : Return Address
0xffffff8097b1bd10 : 0xffffff801841d5f6
0xffffff8097b1bd80 : 0xffffff80184876ab
0xffffff8097b1bdb0 : 0xffffff801846256b
0xffffff8097b1bf40 : 0xffffff80184b7f69
0xffffff8097b1bfb0 : 0xffffff80184ce3d1
BSD process name corresponding to current thread: openssl
Mac OS version:
12B19
Kernel version:
Darwin Kernel Version 12.1.0: Tue Aug 14 13:29:55 PDT 2012; root:xnu-2050.9.2~1/RELEASE_X86_64
Kernel UUID: 3005059E-270B-3B9F-940D-7A66C05DDC9D
Kernel slide:     0x0000000018200000
Kernel text base: 0xffffff8018400000
System model name: MacBookPro4,1 (Mac-F42C89C8)
System uptime in nanoseconds: 101332987499
last loaded kext at 63261856267: com.apple.driver.AppleHWSensor          1.9.5d0 (addr 0xffffff7f9a234000, size 36864)
loaded kexts:
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.driver.AudioAUUC          1.60
com.apple.iokit.IOBluetoothSerialManager          4.0.9f8
com.apple.driver.AppleTyMCEDriver          1.0.2d2
com.apple.filesystems.autofs          3.0
com.apple.driver.AppleHDAHardwareConfigDriver          2.3.0f2
com.apple.driver.AppleHDA          2.3.0f2
com.apple.iokit.IOBluetoothUSBDFU          4.0.9f8
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f8
com.apple.driver.AppleSMCLMU          2.0.2d0
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.ApplePolicyControl          3.2.6
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.driver.AppleSMCPDRC          1.0.0
com.apple.driver.AppleMuxControl          3.2.6
com.apple.driver.AppleBacklight          170.2.3
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.driver.AppleLPC          1.6.0
com.apple.GeForce          8.0.0
com.apple.driver.SMCMotionSensor          3.0.2d6
com.apple.driver.AppleUSBTCButtons          235.4
com.apple.driver.AppleUSBTCKeyEventDriver          235.4
com.apple.driver.AppleUSBTCKeyboard          235.4
com.apple.driver.AppleIRController          320.15
com.apple.driver.AppleFileSystemDriver          3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          34
com.apple.iokit.SCSITaskUserClient          3.5.1
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.2.1
com.apple.driver.AppleUSBHub          5.1.6
com.apple.driver.AirPortBrcm43224          600.36.17
com.apple.driver.AppleFWOHCI          4.9.5
com.apple.driver.AppleAHCIPort          2.4.0
com.apple.driver.AppleIntelPIIXATA          2.5.1
com.apple.iokit.AppleYukon2          3.2.3b1
com.apple.driver.AppleUSBEHCI          5.1.5
com.apple.driver.AppleUSBUHCI          5.1.5
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.driver.AppleEFINVRAM          1.6.1
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.7
com.apple.driver.AppleACPIButtons          1.6
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.6
com.apple.driver.AppleAPIC          1.6
com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0
com.apple.nke.applicationfirewall          4.0.39
com.apple.security.quarantine          2
com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
com.apple.iokit.IOSerialFamily          10.0.6
com.apple.kext.triggers          1.0
com.apple.driver.DspFuncLib          2.3.0f2
com.apple.iokit.IOAudioFamily          1.8.9fc9
com.apple.kext.OSvKernDSPLib          1.6
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f8
com.apple.driver.AppleHDAController          2.3.0f2
com.apple.iokit.IOHDAFamily          2.3.0f2
com.apple.iokit.IOSurface          86.0.2
com.apple.iokit.IOBluetoothFamily          4.0.9f8
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.driver.AppleGraphicsControl          3.2.6
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.driver.IOPlatformPluginFamily          5.2.0d16
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.nvidia.nv50hal          8.0.0
com.apple.NVDAResman          8.0.0
com.apple.iokit.IONDRVSupport          2.3.4
com.apple.iokit.IOGraphicsFamily          2.3.4
com.apple.driver.AppleSMC          3.1.3d11
com.apple.driver.AppleUSBMultitouch          235.7
com.apple.iokit.IOUSBHIDDriver          5.0.0
com.apple.driver.AppleUSBMergeNub          5.1.5
com.apple.driver.AppleUSBComposite          5.0.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1
com.apple.iokit.IOBDStorageFamily          1.7
com.apple.iokit.IODVDStorageFamily          1.7.1
com.apple.iokit.IOCDStorageFamily          1.7.1
com.apple.iokit.IOATAPIProtocolTransport          3.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.1
com.apple.iokit.IOUSBUserClient          5.0.0
com.apple.iokit.IO80211Family          500.15
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IOAHCIFamily          2.2.0
com.apple.iokit.IOATAFamily          2.5.1
com.apple.iokit.IONetworkingFamily          3.0
com.apple.iokit.IOUSBFamily          5.1.6
com.apple.driver.AppleEFIRuntime          1.6.1
com.apple.iokit.IOHIDFamily          1.8.0
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          220
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          344
com.apple.iokit.IOStorageFamily          1.8
com.apple.driver.AppleKeyStore          28.18
com.apple.driver.AppleACPIPlatform          1.6
com.apple.iokit.IOPCIFamily          2.7
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto          1.0
Model: MacBookPro4,1, BootROM MBP41.00C1.B03, 2 processors, Intel Core 2 Duo, 2.4 GHz, 2 GB, SMC 1.27f3
Graphics: NVIDIA GeForce 8600M GT, GeForce 8600M GT, PCIe, 256 MB
Memory Module: BANK 1/DIMM1, 2 GB, DDR2 SDRAM, 667 MHz, 0x7FBA000000000000, 0x202020202020202020202020202020202020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8C), Broadcom BCM43xx 1.0 (5.10.131.36.16)
Bluetooth: Version 4.0.9f8 10405, 2 service, 18 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: WDC WD1600BEVT-22A23T0, 160.04 GB
Parallel ATA Device: HL-DT-ST DVDRW GSA-S10N
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0xfd400000 / 2
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x1a100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x820f, 0x1a110000 / 3
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0231, 0x5d200000 / 3
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x5d100000 / 2

The panic is almost certainly caused by bad RAM, notwithstanding the fact that it didn't happen before the OS upgrade.

Clean Install Mountain Lion on upgrade-SSD of a 2012 MBP

Dear strangers,
I searched the internet for a while, but didn't seem to find an answer. I would like to buy the current MBP (non-retina) and upgrade the HDD with an SSD (since Apple prices are rather ridiculous). So I want do perform a clean install on this SSD, what is the best option? I understood that there are no installation disks anymore, but how do you perform a clean install on an 3rd party SSD when you bought a Mac(Book Pro) with Mountain Lion already installed on it? I know I could make a bootable USB drive, but then you need to have a disk image of the OS.
Anyone? I need help quick!
Thanks in advance,
Arno Claes
Belgium

This is the message that would happen with Lion, see this: http://support.apple.com/kb/HT4649
Basically when you setup a Raid 0/1, the Lion and Mt. Lion installer won't/can't create a recovery partition.
When you boot from a recovery partition you have access to certain tools, e.g. Disk Utility to restore a Time Machine back up, redownload the OS, etc.
The recovery partition provides a certain bit of convenience but isn't absolutely necessary to run the OS. When you see the message, doesn't it let you go ahead with the install, accepting that no recovery partition will be created?
If you need some of the recovery partition tools, you have a bootable USB stick as well as a backup of the Mt. Lion installer, no?

AMD 5770 stuttering with clean install Mountain Lion

I am having issues with bad screen stuttering using an AMD Radeon HD5770 on my early 2008 3,1 Mac Pro running two 24" Apple Cinema Display in portrait mode. The screen stutter/shaking issue is very obvious when using animations like alternating between Spaces/Desktops.
This issue does not occur using the Mac Pro's original ATI Radeon HD 2600 XT.
I do not think the HD5770 graphics card is to blame because the issue does not occur when I boot into my legacy internal hard drive, which over the years I have updated from OS X 10.4 Tiger to Mountain Lion.
FYI- I had previously used an ATI Radeon HD3870 with that drive...is it possible there are old AMD drivers enabling the HD5770 to work?
The screen stutter issue only occurs when I have booted to a clean install of Mountain Lion on my OWC Mercury Accelsior PCIe SSD. Is it possible that booting onto the PCIe SSD is interfering with the HD5770? I LOVE this SSD card and really want to continue using it as my boot drive, so I'd like to figure out how to enable it to work with this graphics card.
Since Mountain Lion includes the HD5770 drivers, I am perplexed why a clean install would not work but the upgraded system does.
Since there are no drivers to install, I have reached an impasse with my clean install of OS X 10.8.
Any thoughts how to troubleshoot this?

Sorry to hijack the thread a little but I have an early 2008 Mac Pro with the HD5770 card and I'm thinking about the OWC Mercury Accelsior PCIe card. While I gather from your post that they both work together okay in your system, I'm wondering if you had any issues fitting things in. Any problems with the two in the same system?
Thanks,

Best way to clean install mountain lion on a new ssd

Am in the process of upgrading my late 2008 MacBook Pro (15"). Have had 8 GB RAM installed for over a year now, as well as Lion, and it's doing fine but want to upgrade it some more to get another couple years out of it. Have ordered a 120 GB SSD and will be installing it in place of the optical drive to speed up boot and programs access. Also would like to upgrade to Mountain Lion IF it'll upgrade performance and add worthwhile features. Assuming that's the case, is it best to do a clean install of Mountain Lion on the new SSD or just clone the existing hard drive? What's the best technique for doing a clean install and for cloning?

Go to the App Store. Sign in with your Apple ID and password. Purchase and download Mountain Lion. It's over 4 GBs so it will take some time to download.
When it finishes the installer will launch automatically and present you with a window for installing. I suggest you quit the installer at this point. Follow these instructions:
Make Your Own Mountain/Lion Installer
1. After downloading Mountain/Lion you must first save the Install Mac OS X Mountain/
    Lion application. After Mountain/Lion downloads DO NOT click on the Install button.
    Go to your Applications folder and make a copy of the Mountain/Lion installer. Move
    the copy into your Downloads folder. Now you can click on the Install button. You
    must do this because the installer deletes itself automatically when it finishes
    installing.
2. Get a USB flash drive that is at least 8 GBs. Prep this flash drive as follows:
a. Open Disk Utility in your Utilities folder.
b. After DU loads select your flash drive (this is the entry with the mfgr.'s ID and size) from the left
      side list. Click on the Partition tab in the DU main window.
c. 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.
d. Select the volume you just created (this is the sub-entry under the drive entry) from the left side
      list. Click on the Erase tab in the DU main window.
e. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the
      button for Zero Data and click on OK to return to the Erase window.
f. Click on the Erase button. The format process can take up to an hour depending upon the flash
     drive size.
3. Use Lion DiskMaker 2.0 to put your installer clone onto the USB flash drive.
Note: The term Mountain/Lion used above means Lion or Mountain Lion.
You can then install your SSD. Boot the computer from the Mountain Lion USB flash drive to install onto the SSD after you partition and format the SSD:
Drive Partition and Format
1. Boot from Mountain Lion USB flash drive installer. When the main menu appears select Disk Utility and click on the Continue button.
Boot Using OPTION key:
a. Restart the computer.
b. Immediately after the chime press and hold down the
      "OPTION" key.
c. Release the key when the boot manager appears.
d. Select the USB Flash Drive Installer.
e. Click on the arrow button below the icon.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. 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. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Apply button and wait until the process has completed.
4. When formatting is complete quit DU and return to the main menu. Select Install/Reinstall Mountain Lion and click on the Continue/Install button.

Can not access my Time machine HD after CLEAN install Mountain Lion

Hi Everyone!
Thank you in advance for your interest and help, I really appreciate it.
I recently did a clean Install of Mountain Lion and already did all the updates that appeared. However, before doing these clean install, I did a back up with Time Machine on my external Hard drive. Now I can't access to it, doesn't even appear on my sidebar when I connect it. On the other hand it does appear as connected when I open Disk Utility, but I can not access to it. There I have all my 5 years of University works and classes, photos, and music. This Hard drive is only dedicated for my Mac Backups and nothing more.
I guess that if I install again Snow Leopard, it will work, but I have to re install everything as my Mac is a Mid or Late 2007 15-inch Macbook pro and it came with the OS before the snow leopard 10.5 or something like that.
What can I or should I do to access my Hard Drive again?
Best Regards
Edd

Hi Mende,
Sorry for my late reply but I want to thank you for your help.
I followed your instructions and now I can access the drive thank you a lot for this. However, now I don't want to restore everything from my last back-up just some files, How can I do this? Also I want to restore My iLife, but the copy I have from the CD that came with my mac doesn't allow to install it, what can I do.
Take good care, and happy holidays.
Best Regards
Edd
PD. Are you from Spain?

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!!

Help! Clean install Mountain lion, nothing happened after entering Apple ID

I have a Macbook Air 11 (mid-2011). Recently I have purchased Mountain lion from App store and upgraded it with no problems. But I would like to have a clean installation to clear all my previous settings and installed Apps.
I pressed 'Option' to restart the computer to Recovery mode, run 'Disk Utility' to erase the harddisk, then clicked 'reinstall OS' to start the installation.
The first few steps look good, when it comes to select a partition for installation, I selected the harddisk and clicked 'Continue'. Then it prompts me to enter my Apple ID and password, I entered it, then the prompt box disappeared with nothing to happen. I then tried to click 'Continue' again, the input box prompted again to ask me for my Apple ID and password, I entered again and, again, nothing happened.
First I thouhg it may be the network problem, so I click 'Continue' again and this time I entered a wrong password. But it can warn me that my password is incorrect, which means the system can actually connect to the internet.
I then opened the log window, and see the following error messages:
localhost Unknown[287]: 2012-08-02 09:29:52.489 Install OS X Mountain Lion[312:1803] Couldn't find app store version, falling back to hardcoded
localhost Install OS X Mountain Lion[312]: Can not connect to /var/run/systemkeychaincheck.socket: No such file or directory
Please help!!
Thanks in advance.

I have had this problem today as well, I phoned Apple and they said it's a known issue that they don't know how to fix it at the moment. I can't get past the grey start up screen with the Apple logo and the spinning wheel. I can get in to the recovery utility but can't download ML.
I went to a repair centre earlier today and they installed it from a disk they had made themselves and it booted twice after that and then died again.
I've booked in for them to call me tomorrow morning so I'll see what they have to say.

Constant Freeze Even After Clean Install Mountain Lion

Hi!
I have before started a post on similar topic but back then it ended with a clean install which worked nicely for merely a month.
Currently I am using 13' MBP 2010 with 2.4 GHz Core 2, 4 GB DDR3. 168GB free of use and latest Mountain Lion, 10.8.3.
My Mac started acting weird and all in all application I am opening.
It will freeze and show that beach ball for 1 or 2 seconds. Believe me, it's extremely annoying if you are listening to music with iTunes or editing photos with Aperture.
I had installed some apps like Aperture, PopClip, Pocket, Transmission, Onyx, Paragon NTFS.
I am tired of doing clean install and re-installing all the apps with their updates, not to mention restoring all of my datas from Time Machine.
I have done booting in Safe Mode and repaired permissions from there. I have reset PRAM/SMC.
Please anyone, enlighten me on this!

The surface scan will take quite a while.
Aperture can pull quite a bit of RAM, so Raidiation Mac's suggestion about more RAM for pro apps is a good one, if all else turns up OK.
OnyX shouldn't be a problem but on the other hand you shouldn't need it for anything. Maintenance and optimization are things your Mac should be doing in the background with no further help needed. Downloading torrents is always iffy and an easy way to pick up malware. The rest of the third party apps I'm not familiar with.
I wish you had tested the clean install before adding the apps. If you have another disk you can do a clean install of ML on and run from that disk for a while, it would tell whether it was your Mac or the added software.

Better to clean install Mountain Lion?

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