HT5167 downgrade to lion 10.7.4

Hey everyone and Merry Christmas!!
I recently bought a second hand Mac Pro. It had Lion 10.7.4 installed, but I needed to upgrade the hard drive. In doing so, and being new to mac, I lost the recovery HD section (which at the time I didn't even know existed!) I then formatted the previous systems HD to use as an audio drive. My new install of Lion 10.7.4 is now having problems and DiskUtility is saying I need to use Recovery HD to fix it. From what I understand, I need to do a fresh instal of Lion in order for it to create a recovery HD partition and fix the problem. Since 10.7.4 isn't available on the App Store any more, is it possible to buy Lion 10.8 and then use a 10.7.4 'upgrade' to essentially downgrade my OS to 10.7.4? A lot of the music software I use runs best with 10.7.4....or so I'm told, hence the downgrade request. Any help to this newly converted Mac user would be grately appreciated....but please be aware I'm pretty new to Mac, so I might need some step by step instructions if things get a bit complicated!
Many thanks!!
Tim
Processor 2 x 3 GHz Quad-Core Intel Xeon
Memory 16 GB 667 MHz DDR2 FB-DIMM
Software Mac OS X Lion 10.7.4

You can buy Lion, but it will be the latest 10.7.5. Get a redemption code for Lion from its online store's telesales agents: 1-800-MY-APPLE (1-800-692-7753) or Customer Service and Sales Support at 1-800-676-2775. The redemptions code comes via e-mail and need to DL from the Mac App Store (requires SL 10.6.6+).

Similar Messages

After the upgrade to ML and then downgrade to Lion, my laptop keeps crashing

Maha.M.Ali
Aug 13, 2012 2:44 AM
Hello there,D
I know you've asked this guestion a million time already but this is a differant case senario, I guess!
My computer has been running just fine.. Then I upgrade to ML and then started to slowely load and freezes all the time.
Then, I downgraded to lion and the computer was fine for a day or 2, then, I couldnt work with Safari, Firefox, Chorme, and Oprah for 5 minites without crashing..
I tried a clean install, the one solotion where I have to delete caches for Safari and Firefox, I also tried the installation CD and pressing the C key and then go to disk utility and repaire disk....
I keep getting this mulitilanguages message in a gray box:
" you need to restart your computer. Hold down the power bottun until it turns off, then press the power bottun again"
and this
Interval Since Last Panic Report: 41828 sec
Panics Since Last Report:          2
Anonymous UUID:                    523D1E9C-C520-412E-8CF6-750CC8D6DC74
Mon Aug 13 12:22:32 2012
panic(cpu 3 caller 0xffffff80002c473a): Kernel trap at 0xffffff80003d371c, type 13=general protection, registers:
CR0: 0x000000008001003b, CR2: 0x000000000657b000, CR3: 0x0000000000100000, CR4: 0x00000000000606e0
RAX: 0x0000000028a35fad, RBX: 0x00000000006dbf3e, RCX: 0x00000000006dbf3e, RDX: 0xffffff8011889210
RSP: 0xffffff80f0543f20, RBP: 0xffffff80f0543f70, RSI: 0xffffff80f0543ee8, RDI: 0xffffff8011889210
R8: 0xffffff80113a4c80, R9: 0x0000000000000000, R10: 0x8000000000100000, R11: 0xffffff800063cce4
R12: 0xffffff80003d36c0, R13: 0x0000000000000000, R14: 0xff9aff801489ac40, R15: 0xff9aff801489ac40
RFL: 0x0000000000010282, RIP: 0xffffff80003d371c, CS: 0x0000000000000008, SS: 0x0000000000000010
CR2: 0x000000000657b000, Error code: 0x0000000000000000, Faulting CPU: 0x3
Backtrace (CPU 3), Frame : Return Address
0xffffff80f0543bd0 : 0xffffff8000220792
0xffffff80f0543c50 : 0xffffff80002c473a
0xffffff80f0543e00 : 0xffffff80002da0cd
0xffffff80f0543e20 : 0xffffff80003d371c
0xffffff80f0543f70 : 0xffffff800023dbbc
0xffffff80f0543fb0 : 0xffffff8000820057
BSD process name corresponding to current thread: kernel_task
Mac OS version:
11E53
Kernel version:
Darwin Kernel Version 11.4.0: Mon Apr 9 19:32:15 PDT 2012; root:xnu-1699.26.8~1/RELEASE_X86_64
Kernel UUID: A8ED611D-FB0F-3729-8392-E7A32C5E7D74
System model name: MacBookPro8,1 (Mac-94245B3640C91C81)
System uptime in nanoseconds: 1845241812273
last loaded kext at 1491733910066: com.apple.filesystems.smbfs          1.7.2 (addr 0xffffff7f80791000, size 241664)
last unloaded kext at 349663747076: com.apple.driver.AppleUSBUHCI          4.4.5 (addr 0xffffff7f80a51000, size 65536)
loaded kexts:
com.globaldelight.driver.BoomDevice          1.1
com.apple.filesystems.smbfs          1.7.2
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.driver.AppleMikeyHIDDriver          122
com.apple.driver.AudioAUUC          1.59
com.apple.driver.AppleUpstreamUserClient          3.5.9
com.apple.driver.AppleMCCSControl          1.0.26
com.apple.driver.AppleHDA          2.2.0f3
com.apple.driver.AppleMikeyDriver          2.2.0f3
com.apple.driver.AppleIntelHD3000Graphics          7.1.8
com.apple.driver.AGPM          100.12.42
com.apple.driver.SMCMotionSensor          3.0.2d6
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.driver.AppleSMCPDRC          5.0.0d0
com.apple.iokit.IOBluetoothSerialManager          4.0.5f11
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AudioIPCDriver          1.2.2
com.apple.driver.AppleSMCLMU          2.0.1d2
com.apple.driver.ACPI_SMC_PlatformPlugin          5.0.0d0
com.apple.driver.AppleLPC          1.5.8
com.apple.driver.AppleBacklight          170.1.9
com.apple.filesystems.autofs          3.0
com.apple.driver.BroadcomUSBBluetoothHCIController          4.0.5f11
com.apple.driver.AppleUSBTCButtons          225.2
com.apple.driver.AppleUSBTCKeyboard          225.2
com.apple.driver.AppleIRController          312
com.apple.iokit.SCSITaskUserClient          3.2.0
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCISerialATAPI          2.0.3
com.apple.iokit.IOAHCIBlockStorage          2.0.3
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          33
com.apple.driver.AppleUSBHub          4.5.0
com.apple.driver.AppleFWOHCI          4.8.9
com.apple.driver.AirPort.Brcm4331          530.4.20
com.apple.driver.AppleSDXC          1.2.0
com.apple.iokit.AppleBCM5701Ethernet          3.1.2b2
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.driver.AppleEFINVRAM          1.5.0
com.apple.driver.AppleAHCIPort          2.3.0
com.apple.driver.AppleUSBEHCI          4.5.8
com.apple.driver.AppleACPIButtons          1.5
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.6
com.apple.driver.AppleSMBIOS          1.8
com.apple.driver.AppleACPIEC          1.5
com.apple.driver.AppleAPIC          1.5
com.apple.driver.AppleIntelCPUPowerManagementClient          193.0.0
com.apple.nke.applicationfirewall          3.2.30
com.apple.security.quarantine          1.3
com.apple.driver.AppleIntelCPUPowerManagement          193.0.0
com.apple.driver.DspFuncLib          2.2.0f3
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.iokit.IOSurface          80.0.2
com.apple.iokit.IOSerialFamily          10.0.5
com.apple.iokit.IOFireWireIP          2.2.4
com.apple.iokit.IOAudioFamily          1.8.6fc17
com.apple.kext.OSvKernDSPLib          1.3
com.apple.driver.AppleHDAController          2.2.0f3
com.apple.iokit.IOHDAFamily          2.2.0f3
com.apple.driver.ApplePolicyControl          3.0.16
com.apple.driver.AppleGraphicsControl          3.0.16
com.apple.driver.AppleSMC          3.1.3d8
com.apple.driver.IOPlatformPluginLegacy          5.0.0d0
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.IOPlatformPluginFamily          5.1.0d17
com.apple.driver.AppleBacklightExpert          1.0.3
com.apple.iokit.IONDRVSupport          2.3.2
com.apple.driver.AppleIntelSNBGraphicsFB          7.1.8
com.apple.iokit.IOGraphicsFamily          2.3.2
com.apple.kext.triggers          1.0
com.apple.driver.AppleUSBBluetoothHCIController          4.0.5f11
com.apple.iokit.IOBluetoothFamily          4.0.5f11
com.apple.driver.AppleThunderboltDPInAdapter          1.8.2
com.apple.driver.AppleThunderboltDPAdapterFamily          1.8.2
com.apple.driver.AppleThunderboltPCIDownAdapter          1.2.4
com.apple.driver.AppleUSBMultitouch          227.1
com.apple.iokit.IOUSBHIDDriver          4.4.5
com.apple.driver.AppleUSBMergeNub          4.5.3
com.apple.driver.AppleUSBComposite          4.5.8
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.2.0
com.apple.iokit.IOBDStorageFamily          1.6
com.apple.iokit.IODVDStorageFamily          1.7
com.apple.iokit.IOCDStorageFamily          1.7
com.apple.iokit.IOSCSIArchitectureModelFamily          3.2.0
com.apple.driver.AppleThunderboltNHI          1.5.5
com.apple.iokit.IOThunderboltFamily          2.0.0
com.apple.iokit.IOUSBUserClient          4.5.8
com.apple.iokit.IOFireWireFamily          4.4.5
com.apple.iokit.IO80211Family          420.3
com.apple.iokit.IOEthernetAVBController          1.0.1b1
com.apple.iokit.IONetworkingFamily          2.1
com.apple.iokit.IOAHCIFamily          2.0.8
com.apple.iokit.IOUSBFamily          4.5.8
com.apple.driver.AppleEFIRuntime          1.5.0
com.apple.iokit.IOHIDFamily          1.7.1
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          177.5
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          331.6
com.apple.iokit.IOStorageFamily          1.7.1
com.apple.driver.AppleKeyStore          28.18
com.apple.driver.AppleACPIPlatform          1.5
com.apple.iokit.IOPCIFamily          2.6.8
com.apple.iokit.IOACPIFamily          1.4
Model: MacBookPro8,1, BootROM MBP81.0047.B27, 2 processors, Intel Core i7, 2.7 GHz, 8 GB, SMC 1.68f98
Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 512 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0000, 0x000000000000000000000000000000000000
Memory Module: BANK 1/DIMM0, 4 GB, DDR3, 1333 MHz, 0x0000, 0x000000000000000000000000000000000000
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 (5.106.198.4.20)
Bluetooth: Version 4.0.5f11, 2 service, 11 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: TOSHIBA MK5065GSXF, 500.11 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: hub_device, 0x0424 (SMSC), 0x2513, 0xfa100000 / 3
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 5
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x821a, 0xfa113000 / 8
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0245, 0xfa120000 / 4
USB Device: FaceTime HD Camera (Built-in), apple_vendor_id, 0x8509, 0xfa200000 / 2
USB Device: hub_device, 0x0424 (SMSC), 0x2513, 0xfd100000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd110000 / 3
MacBook Pro, Mac OS X (10.7.4), 8GB RAM 500GB HDD
I have this question too (0) Categories: Internet and Networking, Using the Mac Pro Tags: lion;, mountain_lion;, browsers_crash;

How did you Downgrade to Lion?
If you didn't erase the Macintosh HD partition then install Lion clean you didn't downgrade.

How can I downgrade from Lion to Snow Leopard?

Hello.
Yesterday, I upgraded my Mac to Mac OS X (10.7 Lion) from 10.6.8 Snow Leopard. However, I wish to downgrade.
Obviously, I would like to not lose any data at all. However, I have never downgraded before.
I still have the Snow Leopard installation disk that came with my Mac.
How should I do this? I was thinking it would be easiest to simply head on over to an Apple Store...
I did some research (aka Googling), and I read up on the subject quite a bit.
If I simply put in the disk, will I be able to downgrade from Lion to Snow Leopard as easily as the upgrade was?
Also, I have heard about holding down the "C" button to do this... how exactly?
I have never backed up my Mac, nor used Time Machine.
Also, is it possible to install Snow Leopard on a separate disk, and set it up so that I can switch between them on command?
Will all of my preferences be saved, or does this wipe everything, not just the system and libraries folders?
I realize that I have a lot of questions, and therefore I appreciate everyone's help in advance. Thanks again.
Sincerely, Zach

Backup your files.
Booting From An OS X Installer Disc
1. Insert Snow Leopard Installer Disc into the optical drive.
2. Restart the computer.
3. Immediately after the chime press and hold down the "C" key.
4. Release the key when the spinning gear below the dark gray Apple logo appears.
5. Wait for installer to finish loading.
Erase Drive
1. Boot from your OS X 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. Upon completion quit DU and return to installer. Install Snow Leopard. Restore your files after the installation has completed.

Password issue when re-instaling Leopard (downgrade from Lion)

Hi there!
I'm havig a problem:
I need to downgrade from Lion to Leopard, because some of the programs i use, dont work on Lion!
But im havig a problem, after Leopard instalation (and after i erased Lion)... the instalation of Leopard runs with success, but when i have to put user name and password to LOG IN... my password doesnt work! And im sure i only have this password! HELP! Any ideas on how i could reset it some how?
Without this correct password, i need to restore (from my MAC OX 10.7 backup) my MAC to Lion again, because i just cant LOG IN!!
I've made the whole process 3 times already!!
Hope i've explained myself ok.
Thanks for your help in advance... and sorry about my english!
Benny

Well, you cannot do a clean install of Snow Leopard without going through the Setup Assistant. There is an automatic suggestion for the username - typically your first name - and a blank password field you must fill in then confirm by entering a second time. If you did not do that then you have no password. Although this will not impede the ability to log in you cannot change a blank password and you cannot install software with a blank password.
So you will need to try this:
How to change your username and/or password from the Terminal
1. Boot into single-user or verbose mode
2. At the prompt enter the following commands. Press RETURN after each:
fsck -fy
mount -uw /
launchctl load /System/Library/LaunchDaemons/com.apple.DirectoryServices.plist
dscl . -passwd /Users/username password
Replace username with the targeted user and password with the desired password.
reboot
This allows you to reset the password in single user mode without booting from the install media. The above tip is attributed to Satcomer.

Since downgrading to LION iCal frequently crashes on opening

Since downgrading to LION iCal frequently crashes on opening or very soon afterwards. Sometimes does it 3x in a row then finally opens.
Anyone else have this problem?
Thanks for your time,
Jules
Macbook Pro 7i , 10.7.2

The linked crash report is empty and doesn't include any data, so not much to tell about the cause.
Do you have submitted another recent crash report that does show a crashing thread?
See:
*http://kb.mozillazine.org/Firefox_crashes
*https://support.mozilla.com/kb/Firefox+crashes

I updated my macbook to lion and now have issues. should i downgrade to lion?

i updated my macbook to lion and now have issues. should i downgrade to lion?
they are;
1. my sound sometimes mutes it self (sound control grayed out) or it switches rapidly from interior speakers to headphones.
2. i keep getting "session time out" and am diconected from my wifi.
thanks kit

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

I recently Downgraded from Lion to Snow Leopard 10.6. How do I update to 10.6.2 or beyond?

This is the problem... How do I fix that?

app61 wrote:
I recently Downgraded from Lion to Snow Leopard 10.6
How did you do that ?

Trying to downgrade Mountain Lion to Lion

hey team:
I've been attempting to downgrade Mountain Lion 10.8.5 to Lion for a client's Mac Pro machine and am having a hard time doing something that I've done easily in the past.
The Mac Pro came with Lion installed, but for some reason I advised my client to upgrade to Mountain Lion, thinking that Apple would improve their operating system. Since installing Mountain Lion, he's had trouble with large file transfers crashing, screen turning green / grey and then crashing, FCP 7 frame issues on playback, etc etc
I've since made a Lion install clone to USB, and my Macbook Pro laptop will boot to that when I hold the Option key.
Holding the option key on the keyboard on the Mac Pro at startup however, with the same Lion USB inserted, yields the startup tone and a black screen. No option to boot to an alternate drive. No Apple logo. Nothing.
I've also made a Mountain Lion USB install, and holding option with that inserted, yields the startup tone and a black screen. No option to boot to an alternate drive. No Apple logo. Nothing.
When I hold Command-Option-R, it will boot from the Mountain Lion USB, but not the Lion USB, even though the same workflow works fine on the laptop.
I've even tried booting to my Snow Leopard DVD; the DVD drive spins up for a while, then stops. All with a black screen. I understand though that this might be a newer machine that won't support Snow Leopard (which is ridiculous by the way -- how is this good enough Apple?)
Is there something about 10.8.5 that locks you into 10.8.5 on a MacPro tower? This machine came with Lion installed, so obviously it can run it. Why does holding Option on bootup on the MacPro no longer work? The Option-boot works on my Macbook Pro laptop, which is also running 10.8.5.
Thanks for any help and advice!
Paul

Solved my problem cloning an old Snow Leopard machine with Carbon Copy Cloner -- a great free program that saved me this time -- to an external hard drive.
Mac Pro still wouldn't Option mount the cloned drive (I'm wondering if it's a hardware problem on this tower), so I set the tower to Target Mode, attached a Firewire to my laptop, and attached the external hard disk with the cloned Snow Leopard machine also to my laptop.
After the Mac Pro tower drive appeared on my lappy as a firewire drive, I wiped it using my laptop's Disk Utility, then cloned the cloned Snow Leopard external hard drive to the Mac Pro tower hard drive.
Mac Pro started up fine -- and apparently this tower can run Snow Leopard! But I then immediately updated to Lion using the USB stick previously mentioned, which was succesful first time out. Running Software Update brought me up to the latest version of Lion 10.7.5
Thank goodness for Carbon Copy Cloner -- and that I had a laptop still running Snow Leopard in my arsenal!

How do I downgrade from Lion to Snow Leopard without losing iWork 09? I upgraded my MBP from 10.5 (originally 10.4) to 10.6, then again to 10.7. Should I go back to 10.4, 10.5 or just to 10.6?

How do I downgrade from Lion to Snow Leopard without losing iWork 09? I upgraded my MBP from 10.5 (originally 10.4) to 10.6, then again to 10.7. Should I go back to 10.4, 10.5 or just to 10.6? I don't remember which system included iWork 09 and don't want to lose it. Thanks for any help.

Thanks for the information! My sister gave me the MBP for my daughter with Leopard installed. I purchased Snow Leopard and installed it, then my daughter purchased Lion. So I do have all the installers. If iWork wasn't included with any of those, I guess my sister purchased it while running Leopard. I'll have to contact her. Thanks again.

How do I downgrade Mountain Lion?

To be honest, I was really excited for Mountain Lion when it came out. However, I'm more recently a bigger minecraft fan than I expected to be. Therefore, I have noticed that the Library folder (was found under User) can no longer be visible. All I want to do is uninstall some specs and textures off of minecraft, but I can't without finding the Applications Support Folder. I would greatly appreciate it if there was a simple way to do this. It is frustrating that Apple is so "exclusive" that it cannot allow for downgrading an OS without having to back up literally everything and spending hours restoring. SO, all that to say, I really would appreciate help locating these folders. Thank you!

I don't know if this will solve your problem, but you can make your library visible by using the terminal command on this link http://osxdaily.com/2011/07/22/access-user-library-folder-in-os-x-lion/. It does work with Mountain Lion.

How do I downgrade mountain lion back to my mac mini 2011 lion server

Hi,
Previously, my mac mini mid 2011 was installed with mac os lion server then I have purchase and upgrade to mountain lion via iTunes.
Somehow I decided to downgrade back to lion server due to use of my mac as server, unfortunately I have no idea how to downgrade with the following reasons:
1. I don't create any time machine backup before so can't use that option.
2. I have enable vault function so now the startup has hide the recovery HD icon
3. In the Recovery mode (command + R), I only see an option to download and reinstall a fresh Mountain Lion only.
4. I can't download and install Lion server from iTunes because this os was bundle with purchase of mac mini 2011 mid version.
Any comments and helps here are appreciated. Thanks.

Well, did you save a Carbon Copy Clone (http://www.bombich.com) of the Lion installation by chance? That would be the easiest to go back to and use / update. Outside of that, or having saved the original Lion installer, I know of no way to get the OS that you are after. For future referece, on a mac mini with two harddrives, I have always made a backup partition on the second drive using CCC, and schedule clone updates to that. You can't rely on TM, inmo, so something like CCC or SuperDuper is essential. Cheers,
jigs

Downgrading from Lion 10.7.5 to Snow Leopard 10.6 w/o Time Machine

I've been trying to solve this issue for a bit, and would appreciate any fresh perspectives on the issue.
I recently purchased a 2006 Mac Pro 1.1. It has a dual 2.66Ghz Xeon processor. I'm fairly sure nothing has been customized in the machine hardware-wise, and that it is in the original configuration apple sold it with in 2006.
The machine arrived with the Lion 10.7.5 OS on it, which was incompatible with some of the software plug-ins I use for editing audio, so I decided to re-install Snow Leopard 10.6. I inserted my install DVD like I would normally, and was greeted with the error message "OSX cannot be installed on this computer, please use version 23.1.1".
I checked out the forums, and seeing that this was a common problem (with what seemed like an easy fix), proceeded to try and install anyway. I booted from the DVD by holding "C" on start-up. After booting and asking what i wanted to use as my language, the error message "Mac OSX cannot be installed on this computer" was displayed. Thinking this was another glitch, I clicked "restore from back-up, then managed to use Disk Utility to wipe my HD and zero out the contents. I reformatted my HD to Mac OS Extended Journaled, Re-partitioned it, and then reset my NV or Pram (Command+option+P+R) until i heard the start-up noise twice.
Next, I restarted the computer, booted it from the disk again, and crossed my fingers it would let me install. No luck.
I don't have a second mac pro to clone, or a Time Machine back-up from this machine (as it is brand new to me). Furthermore, it's previous owner left me with no restore disks, or usb sticks to even put Lion back on (which i don't want to do anyway, but would at least make the machine functional until i can correctly install 10.6SL).
I do have a spare 2009 imac to work with in the meantime, with Snow Leopard, though I'm assuming attempting to clone that drive would screw with the drivers and firmware in the Mac Pro. Are there any tricks to re-install my OS without using a Time Machine back-up or clone? I have the DVD, my machine just doesn't seem to want to install from it. The nearest repair shop is several hours away.
I'm at a loss for what to try next. Any ideas?

The following will only work on a Mac that is capable of being booted by a retail Snow Leopard DVD. Fortunately, you can do the following on your model should you prefer. As an alternative you could simply create a second partition on the hard drive and install a fresh copy of Snow Leopard without having to erase the drive.
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.
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/Mountain Lion files.

Downgrading from Lion 10.7.4

I have had a lot of problems with Lion 10.7.4 on my iMac late 2006 version,the most annoying of which has been the fact that this version of the software took away my display options.
As no one has been able to offer any work arounds (uncluding Apple Support) I think that the only way round this problem will be to return 10 Lion 10.7.3, which behaved oerfectly for me. - Mountain ion will NOT support my iMac.
How can I achieve this downgrade with the least problems?

Don't have anything ear;ier in Lion than 10.7.3 upgrade. The only dvd I have is Snow Leopard
And that is the real problem I suppose. The app store will let me downoad as many copies of 10.7.4 as I want , ut will not allow me to download anything earlier.

ICal and Mail don't work after downgrade from Lion to Snow Leopard

Hey everyone, after an extremely awful time with with Lion (it knocked out of my audio interface AND my wireless) I downgraded back to Snow Leopard yesterday. I made a Carbon Copy of my Lion drive with all my data on an external drive (which I still have) and after wiping my local drive clean I reinstalled Snow Leopard from my disk. After it was done I chose to transfer data from another system local system (I selected everything) and an hour and a half later everything was transferred over. After doing a software update, I've found that I get big error messages with iCal, Mail, and even the App Store that say they can't open and I'm assuming that it has to do with incompatible data that got transferred from Lion. Any ideas on how to get those programs back up and running?? Thanks so much for you help!
Luke
ps. here's the error message from iCal
Dyld Error Message:
Symbol not found: _kSecOIDX509V1ValidityNotAfter
Referenced from: /System/Library/PrivateFrameworks/ApplePushService.framework/Versions/A/ApplePu shService
Expected in: /System/Library/Frameworks/Security.framework/Versions/A/Security
in /System/Library/PrivateFrameworks/ApplePushService.framework/Versions/A/ApplePu shService

> In the device manager the two ports are listed under "other devices" and no driver is installed for them.
Indeed the USB issue seems to be related to missing drivers.
You have to install this USB 3.0 driver:
[AMD USB Driver v 2.0.7.176 Windows 7 - 64 Bit|http://www.toshiba.eu/innovation/download_driver_details.jsp?service=EU&selCategory =2&selFamily=2&selSeries=178&selProduct=7534&selSh ortMod=null&language=13&selOS=30&selType=all&yearu pload=&monthupload=&dayupload=&useDate=null&mode=a llMachines&search=&action=search&macId=&country=al l&selectedLanguage=13&type=all&page=3&ID=87792&OSI D=30&driverLanguage=42]
Furthermore you have to ensure that chipset driver was installed too.
The notebook supports ATI graphic chip and AMD chipset. The chipset driver is part of the ATI graphic card driver and therefore you should ensure that this driver would be installed too.

Late 2013 MacbookPro downgrade to Lion/Mountain Lion

I recently purchased one of the newer macbook pro models with Mavericks pre-installed. Is it possible to downgrade the OS to Lion or Mountain Lion? It's fine if the drive is erased in the process.
Unfortunately my company's IT department doesn't support Mavericks yet - I need to use one of the older versions to use the computer on the company network.

We just ran into this issue ourselves.
We work in a secure environment that for any new OS's, HW, SW, etc, we need to run through a lenghty testing/tiering process. We just spent the last year trying to get 10.8 Mountain Lion approved so we can upgrade our current outdated macs (still running 10.6).
When they displayed the new 15" Retina MacBook's a few weeks back, we talked to our vendor who initially stated that these systems would be backwards compatible with Mac OS X 10.8 Mountain Lion and did not see any readily available information that stated otherwise on the Apple Support sites.
I initially wanted to order one system for testing when they first came out but management decided to order a few dozen, thinking that they were compatible.
We finally get them in and of course they are not compatible with 10.8 Mountain Lion, which is currently the only Mac OS that is approved for our environment, and we can't just test/approve 10.9 Mavericks to use since again there is a lengthy process we need to go through to test/approve the OS.
So now we have to send about 50 of them back and hope that we can somehow get our hands on about 50 of the previous gen 15" MacBook Pro's that we need.
Hopefully Apple will come out with some sort of fix for these new systems to be compatible with Mountain Lion.

HT5167 downgrade to lion 10.7.4

Similar Messages

Maybe you are looking for