If I upgraded my MacBook Pro from Snow Leopard to Lion via the web and now wish to erase the hard drive and restore it to factory settings to sell. How do I accomplish this?

I upgraded the operating system on my MacBook Pro from Snow Leopard to Lion via the web. Now I need to erase the hard drive and restore it to factory settings, so that I can pass it on. How do I accomplish this? When I insert the Mac OS X install disk, the only option is to erase the free space. Any insight would be appreciated.
Thank you

You need to boot off the original Snow Leopard DVD's that came with the system.
Once you are running off of the DVD you will be able to do a clean install of SL
To boot off the DVD with the system up running Lion insert the DVD. Open Sytem Preferences->Startup Disk and select the DVD then restart the machine.
Message was edited by: Frank Caggiano

Similar Messages

Hi ! guys i've recently upgraded my macbook pro from snow leopard to lion.....now my front row app. is missing........is this a lion upgrade or a error.....pls help!!

i've recently upgraded my mac book's os from snow leoopard to lion.......nd i've noticed that front row app. is missing........i miss its liquid graphics of displaying entertainment stuff.........is this an os upgrade or error ....

No. There is no Front Row as part of Lion. But you might like to visit: Install Front Row on Lion.

Can I upgrade my MacBook Pro from Snow Leopard straight to Mountain Lion, or would it be wise to get Lion as well?

I am currently in the process of upgrading the operating system on my girlfriend's MacBook Pro (Model Identifier: MacBookPro5,1). I have purchased and installed Snow Leopard successfully, however I would like to upgrade to the latest operating system, which to date is Moutain Lion.
Am I able to do this?
Is it wise to perform such an upgrade on this model of MacBook Pro (can it handle it)?
I have heard that I can upgrade straight from Snow Leopard to Mountain Lion. What are the advantages and disadvantages of doing this? Will I lose anything at all by not installing Lion before Mountain Lion?
Thanks for the help everyone. Hopefully I can get these questions answered soon.

And the only way to figure that out would be verifying my disk using the Disk Utility?
Thank you for that. If I am not missing out on anything by skipping Lion then that will be my option. A few extra dollars in my pocket is always a good thing.

If I upgrade my macbook pro from snow leopard 10.6.8 to mountain lion, will I lose any current software, files, or need to reinstall or reset anything?

I want to be sure that I won't lose things like microsoft office (I need excel for work) or my word files. Will I lose anything by upgrading to mountain lion? will I need to reinstall things or spend a lot of time restoring and resetting to get things set up as I have them now?

Probably not. Back up your computer first, and ensure that your applications are compatible wih Mac OS X 10.8; Microsoft Office 2004 and earlier aren't.
(85304)

Trying to upgrade a MacBook Pro to snow leopard 10.6.3 and all I get after the upgrade is done is the a blank page with the apple trade mark. I did restart the computer few times and all the same

Trying to upgrade a MacBook Pro to snow leopard 10.6.3 and all I after the upgrade is done I just get a blank page withe apple symbol. I've rebooted the computer and nothing happens

Upgrading from which Mac OS X?
Is this v10.6.3 a retail disc?
You can purchase Snow Leopard from the Apple online store > Mac OS X 10.6 Snow Leopard - Apple Store

I'm using a macbook pro, running snow leopard. Yesterday I got around to emptying my trash for the first time in quite awhile and was surprised by how much there seemed to be in there. Immediately after a question mark symbols appeared on all my hard disk

I'm using a macbook pro, running snow leopard. Yesterday I got around to emptying my trash for the first time in quite awhile and was surprised by how much there seemed to be in there. Immediately after a question mark symbol appeared on all my hard disk folders. If I click on these question marks I get a message saying ' the item can't be found'.

mpagan47 wrote: a question mark symbol appeared on all my hard disk folders.
Not sure where these hard disk folders are located that you are referring to? Finder, Finder tool bar, Finder side bar, Desktop, Dock?
More then likely they are an alias that not longer point to the orginals, thus the question mark.
I would reboot. Delete icons if an alias and just recreate by dragging from the source. Try right click (control) click to remove.

I just updated my 15" macbook pro from Snow Leopard to Mavericks and it's saying Photo booth needs to be updated to be used. Since it comes with the machine I'm assuming I need to buy Mountain Lion or something? Help??

Many apps I would like to download were out of reach because they needed the latest software download to work. I was extrememly excited to hear that the newest update was completely free and knew that it would help some of my problems. I was told that Mavericks could be installed straight from Snow Leopard, but I'm guessing a few updates have been missed on the way? How am I supposed to update my apps like Photo Booth when I am a student with low income and can't afford to buy things like Mountain Lion?
Is there anyway to update my apps without downsizing my software???

First, I see from the screenshot that you have applications on your desktop - how did they wind up there? Any app should be installed in the Applications folder since that is where Software Update expects them to be when it searches for updates. So you might want to move your apps there. Do that, restart, and run Software Update again. If that does not update your very old version of Photo Booth, then I have only one suggestion: use recovery (hold down Command + R keys while restarting or rebooting) to re-download and install Mavericks again over the top of what you have.

I cannot download Firefox from any web site.I recently upgraded my Macbook pro with Snow Leopard 10.6.7. What do I do wrong?

Hardware Overview:
Model Name: MacBook Pro
Model Identifier: MacBookPro2,2
Processor Name: Intel Core 2 Duo
Processor Speed: 2.16 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 3 GB
Bus Speed: 667 MHz
Boot ROM Version: MBP22.00A5.B07
SMC Version (system): 1.12f5
Serial Number (system): W87030AMX6A
Hardware UUID: 00000000-0000-1000-8000-0017F2CEACA4
Sudden Motion Sensor:
State: Enabled
I did all the possible software upgrades that the computer could find and still no progress. Nothing happens when I press the "download" button from the available sites.

https://discussions.apple.com/thread/3286712?start=0&tstart=0

Just upgraded from Snow Leopard to Lion...iMac crashes now.

Hi everyone. I need help. I updated operating system yesterday afternoon from 10.6.8 to 10.7.5. Since then, my iMac keeps on crashing due to kernel panics. It's done this at least 7 times. I'm sure it's software related, but how do I go about identifying which programs are compaitable? Any help on this would be great. Here's a c&p of problem report:
My system specs:
iMac 24" 9,1 early 2009
- Processor 2.66 GHz Intel Core 2 Duo
- Memory 6 GB 1067 MHz DDR3
- Graphics NVIDIA GeForce 9400 256 MB
- Software Mac OS X Lion 10.7.5 (11G63)
Interval Since Last Panic Report: 4631 sec
Panics Since Last Report:          8
Anonymous UUID:                    C4836F3B-587C-4390-9CD3-1B7ABF01F68D
Fri Jan 25 11:01:20 2013
panic(cpu 0 caller 0xffffff800064805c): "IOGMD: not wired for the IODMACommand"@/SourceCache/xnu/xnu-1699.32.7/iokit/Kernel/IOMemoryDescriptor.cp p:1312
Backtrace (CPU 0), Frame : Return Address
0xffffff80a4e526e0 : 0xffffff8000220792
0xffffff80a4e52760 : 0xffffff800064805c
0xffffff80a4e527d0 : 0xffffff8000641316
0xffffff80a4e52880 : 0xffffff8000641624
0xffffff80a4e528a0 : 0xffffff7f808b6b54
0xffffff80a4e52910 : 0xffffff7f80920215
0xffffff80a4e52960 : 0xffffff7f8092033f
0xffffff80a4e529b0 : 0xffffff7f80905c25
0xffffff80a4e52a30 : 0xffffff7f80903f25
0xffffff80a4e52a70 : 0xffffff7f808f2bfd
0xffffff80a4e52b20 : 0xffffff7f8091c607
0xffffff80a4e52d10 : 0xffffff7f8091d668
0xffffff80a4e52de0 : 0xffffff7f81f22f36
0xffffff80a4e52f20 : 0xffffff7f81f230e9
0xffffff80a4e52f30 : 0xffffff7f81f513d1
0xffffff80a4e534b0 : 0xffffff7f81f52475
0xffffff80a4e535e0 : 0xffffff7f81ee1116
0xffffff80a4e53660 : 0xffffff7f81ee127d
0xffffff80a4e53690 : 0xffffff7f81ef67f8
0xffffff80a4e536c0 : 0xffffff7f81f1b8d4
0xffffff80a4e53720 : 0xffffff7f81f36f73
0xffffff80a4e537b0 : 0xffffff7f81f19e99
0xffffff80a4e53810 : 0xffffff7f81f1a2d1
0xffffff80a4e53860 : 0xffffff7f81f1a694
0xffffff80a4e538f0 : 0xffffff7f81f1b4ed
0xffffff80a4e53930 : 0xffffff7f81ed72a1
0xffffff80a4e53aa0 : 0xffffff7f81f1bd6d
0xffffff80a4e53b60 : 0xffffff7f81ed4346
0xffffff80a4e53bc0 : 0xffffff8000655f3e
0xffffff80a4e53be0 : 0xffffff800065681a
0xffffff80a4e53c40 : 0xffffff8000656fbb
0xffffff80a4e53d80 : 0xffffff80002a3f08
0xffffff80a4e53e80 : 0xffffff8000223096
0xffffff80a4e53eb0 : 0xffffff80002148a9
0xffffff80a4e53f10 : 0xffffff800021bbd8
0xffffff80a4e53f70 : 0xffffff80002aef10
0xffffff80a4e53fb0 : 0xffffff80002daec3
      Kernel Extensions in backtrace:
         com.apple.NVDAResman(7.3.2)[97284661-2629-379E-B86B-D388618E8C30]@0xffffff7f808 b0000->0xffffff7f80babfff
            dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff 7f8082b000
            dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xff ffff7f8089e000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0 xffffff7f80865000
         com.apple.GeForce(7.3.2)[7E1D7726-416F-3716-ACCB-E1E276E35002]@0xffffff7f81ec90 00->0xffffff7f81f8bfff
            dependency: com.apple.NVDAResman(7.3.2)[97284661-2629-379E-B86B-D388618E8C30]@0xffffff7f808 b0000
            dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xff ffff7f8089e000
            dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff 7f8082b000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0 xffffff7f80865000
BSD process name corresponding to current thread: Finder
Mac OS version:
11G63
Kernel version:
Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64
Kernel UUID: FF3BB088-60A4-349C-92EA-CA649C698CE5
System model name: iMac9,1 (Mac-F2218FC8)
System uptime in nanoseconds: 6200740740304
last loaded kext at 142765880482: com.zeobit.kext.AVKauth          2.0.1 (addr 0xffffff7f81b02000, size 16384)
last unloaded kext at 5336074703414: at.obdev.nke.LittleSnitch          2.3.09 (addr 0xffffff7f8162b000, size 282624)
loaded kexts:
com.zeobit.kext.AVKauth          2.0.1
com.parallels.kext.prl_hid_hook          7.0 14920.689535
com.parallels.kext.prl_hypervisor          7.0 14920.689535
com.parallels.kext.prl_usb_connect          7.0 14920.689535
com.avira.kext.FileAccessControl          1.0.0d1
com.tidalpoolsoftware.macproxy.kext          2.0.4
com.parallels.kext.prl_vnic          7.0 14920.689535
com.parallels.kext.prl_netbridge          7.0 14920.689535
com.ecamm.driver.BT1VideoDriver          1.0.12
com.ecamm.driver.BT1AudioDriver          1.0.12
com.apple.driver.AppleIntelProfile          85.2
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.filesystems.autofs          3.0
com.apple.driver.AppleHDA          2.2.5a5
com.apple.driver.AGPM          100.12.75
com.apple.driver.AppleMikeyHIDDriver          122
com.apple.driver.AppleUpstreamUserClient          3.5.9
com.apple.driver.AudioAUUC          1.59
com.apple.driver.IOBluetoothA2DPAudioDriver          4.0.8f17
com.apple.driver.AppleMikeyDriver          2.2.5a5
com.apple.driver.IOBluetoothSCOAudioDriver          4.0.8f17
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.iokit.IOBluetoothSerialManager          4.0.8f17
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.AudioIPCDriver          1.2.3
com.apple.driver.ApplePolicyControl          3.1.33
com.apple.driver.AppleLPC          1.6.0
com.apple.driver.ACPI_SMC_PlatformPlugin          5.0.0d8
com.apple.driver.AppleBacklight          170.2.2
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.GeForce          7.3.2
com.apple.driver.CSRUSBBluetoothHCIController          4.0.8f17
com.apple.iokit.SCSITaskUserClient          3.2.1
com.apple.iokit.IOAHCISerialATAPI          2.0.3
com.apple.driver.AppleIRController          312
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          33
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.1.0
com.apple.driver.AppleEFINVRAM          1.6.1
com.apple.driver.AirPort.Brcm4331          561.7.22
com.apple.driver.AppleUSBHub          5.1.0
com.apple.driver.AppleFWOHCI          4.9.0
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleAHCIPort          2.3.1
com.apple.nvenet          2.0.17
com.apple.driver.AppleUSBEHCI          5.1.0
com.apple.driver.AppleUSBOHCI          5.1.0
com.apple.driver.AppleHPET          1.7
com.apple.driver.AppleACPIButtons          1.5
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.5
com.apple.driver.AppleAPIC          1.6
com.apple.driver.AppleIntelCPUPowerManagementClient          195.0.0
com.apple.nke.applicationfirewall          3.2.30
com.apple.security.quarantine          1.4
com.apple.security.TMSafetyNet          8
com.apple.driver.AppleIntelCPUPowerManagement          195.0.0
com.apple.driver.AppleProfileTimestampAction          85.2
com.apple.driver.AppleProfileThreadInfoAction          85.2
com.apple.driver.AppleProfileRegisterStateAction          85.2
com.apple.driver.AppleProfileReadCounterAction          85.2
com.apple.driver.AppleProfileKEventAction          85.2
com.apple.driver.AppleProfileCallstackAction          85.2
com.apple.iokit.AppleProfileFamily          85.2
com.apple.kext.triggers          1.0
com.apple.driver.DspFuncLib          2.2.5a5
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.iokit.IOSurface          80.0.2
com.apple.iokit.IOSerialFamily          10.0.5
com.apple.driver.AppleHDAController          2.2.5a5
com.apple.iokit.IOHDAFamily          2.2.5a5
com.apple.driver.AppleSMC          3.1.3d10
com.apple.driver.IOPlatformPluginLegacy          5.0.0d8
com.apple.driver.IOPlatformPluginFamily          5.1.1d6
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.AppleGraphicsControl          3.1.33
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.driver.AppleUSBAudio          2.9.0f5
com.apple.iokit.IOAudioFamily          1.8.6fc18
com.apple.kext.OSvKernDSPLib          1.3
com.apple.nvidia.nv50hal          7.3.2
com.apple.NVDAResman          7.3.2
com.apple.iokit.IONDRVSupport          2.3.4
com.apple.iokit.IOGraphicsFamily          2.3.4
com.apple.driver.AppleUSBHIDKeyboard          160.7
com.apple.driver.AppleHIDKeyboard          160.7
com.apple.driver.AppleUSBBluetoothHCIController          4.0.8f17
com.apple.iokit.IOBluetoothFamily          4.0.8f17
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.2.1
com.apple.iokit.IOBDStorageFamily          1.7
com.apple.iokit.IODVDStorageFamily          1.7.1
com.apple.iokit.IOCDStorageFamily          1.7.1
com.apple.iokit.IOSCSIArchitectureModelFamily          3.2.1
com.apple.iokit.IOUSBHIDDriver          5.0.0
com.apple.driver.AppleUSBMergeNub          5.1.0
com.apple.driver.AppleUSBComposite          5.0.0
com.apple.iokit.IO80211Family          420.3
com.apple.iokit.IOUSBUserClient          5.0.0
com.apple.iokit.IOFireWireFamily          4.4.8
com.apple.driver.AppleEFIRuntime          1.6.1
com.apple.iokit.IOAHCIFamily          2.0.8
com.apple.iokit.IONetworkingFamily          2.1
com.apple.iokit.IOUSBFamily          5.1.0
com.apple.driver.NVSMU          2.2.9
com.apple.iokit.IOHIDFamily          1.7.1
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          177.8
com.apple.kext.AppleMatch          1.0.0d1
com.apple.driver.DiskImages          331.7
com.apple.iokit.IOStorageFamily          1.7.2
com.apple.driver.AppleKeyStore          28.18
com.apple.driver.AppleACPIPlatform          1.5
com.apple.iokit.IOPCIFamily          2.7
com.apple.iokit.IOACPIFamily          1.4
Model: iMac9,1, BootROM IM91.008D.B08, 2 processors, Intel Core 2 Duo, 2.66 GHz, 6 GB, SMC 1.37f3
Graphics: NVIDIA GeForce 9400, NVIDIA GeForce 9400, PCI, 256 MB
Memory Module: BANK 0/DIMM0, 4 GB, DDR3, 1067 MHz, 0x857F, 0x483634353155363446373036364700000000
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533641465238432D47372020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x8E), Broadcom BCM43xx 1.0 (5.106.198.19.22)
Bluetooth: Version 4.0.8f17, 2 service, 18 devices, 1 incoming serial ports
Network Service: Uverse, Ethernet, en0
Network Service: AirPort, AirPort, en1
Serial ATA Device: WDC WD6400AAKS-40H2B0, 640.14 GB
Serial ATA Device: PIONEER DVD-RW DVRTS08
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0x24400000 / 2
USB Device: Keyboard Hub, apple_vendor_id, 0x1006, 0x26400000 / 3
USB Device: USB Optical Mouse, 0x093a (Pixart Imaging, Inc.), 0x2510, 0x26410000 / 8
USB Device: Apple Keyboard, apple_vendor_id, 0x024f, 0x26420000 / 7
USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0x26200000 / 2
USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0x26240000 / 4
USB Device: Logitech Camera, 0x046d (Logitech Inc.), 0x0821, 0x26244000 / 6
USB Device: Bluetooth USB Host Controller, 0x0a12 (Cambridge Silicon Radio Ltd.), 0x0001, 0x26242000 / 5
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x04500000 / 2
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0x06110000 / 4

Read all about uninstalling Mackeeper (also called 911 sometimes) and UNINSTALL it. There is an unistaller on Mackeeper's site, but I do not think that all will be installed.
That will solve your problem.
If you do not succeed, search on your computer (EasyFind or Findanyfile) for com.zeobit.kext, throw this file in the TrashBin and restart then empty the TrashBin.
Search for all zeobit entries, destroy them.
Never install this crapware again.

Display problem after upgrading MacBook Pro to Snow Leopard

Immediately after upgrading my MacBook Pro to Snow Leopard OSX, the display has been exhibiting vertical gray 'banding' extending up from the bottom of the display. Each band is about 1 inch wide. The display seems dimmer as well, and I can't brighten it up.
I'm in the process of upgrading to Lion (Snow Leopard was the intermediate step) and am hoping that resolves the problem. Any advice/suggestions?

I do not have answers for you, but I'll be waiting to see if someone has a "fix" for this. I am running snow leopard on a MacBook Pro, and I have a dim screen problem that doesn't brighten also. (no lines in mine, though)

I have a MacBook Pro with Snow leopard (10.6.8). Downloaded Lion from Aplle store and got a bill but no upgrade. Bad hearing can't use telephone to support. Apple store can't help. CASE NUMBER: 19*****63

I have a MacBook Pro with Snow leopard (10.6.8). Downloaded Lion from Aplle store and got a bill but no upgrade. Bad hearing can't use telephone to support. Apple store can't help. CASE NUMBER: 19*****63.
I am hard or hearing and can't use the telepohne support and live on an island and can't get to a shot to buy the Lion.
<Case Number Edited by Host>

Try d/ling again. In the App Store, option-click the tab

Hi, having old macbook pro intending to upgrade my os from snow leopard to lion but negative reviews on lion just put me off..i have ms office and photo shop installed on my machine..my question is will upgrading to lion stop me using those application?

Hi, having old macbook pro intending to upgrade my os from snow leopard to lion but negative reviews on lion just put me off..i have ms office and photo shop installed on my machine..my question is will upgrading to lion stop me using those application? thank you.

htfromgrantown wrote:
Hi, having old macbook pro intending to upgrade my os from snow leopard to lion but negative reviews on lion just put me off..i have ms office and photo shop installed on my machine..my question is will upgrading to lion stop me using those application? thank you.
Negative reviews are common place here as it is a trouble shooting forum. If you want to read the advantages, improvements and new features then go to the Apple site. If you are running Word 2004, Early Adobe suite, etc which are PPC programs, then don't update. Go to Apple logo in upper left menu bar, open About this mac > More Info > Software >Applications and sort by 'Kind' and look what PPC programs you have installed. If you are not prepared to upgrade these programs, then do not update to Lion.
There are plenty of threads to read up on about this here. But remember that 99.9% of comments will be negative, even though the forums represent only a tiny fraction of the Millions of Lion Downloads purchased and installed with no issues at all. So basically it's your call.
Good Luck

How to upgrade my macbook pro from 10.6.8?

i wish to upgrade my macbook pro from 10.6.8 what is the best way?

If you wish to upgrade from 10.6.8 (Snow Leopard) to 10.8.x (Mountain Lion), first make sure that your model meets the minimum hardware requirements (http://support.apple.com/kb/sp654) and then download ML by purchasing it from the Mac App Store.
Clinton

I have a mid 2010 Macbook Pro running Snow Leopard and foolishly upgraded to Yosemite. Is it possible to go back in time with Time Machine and reinstall Snow Leopard. Then upgrade to Lion or Mavericks? Any other ideas on how I can exit Yosemite?

I have a mid 2010 Macbook Pro running Snow Leopard and foolishly upgraded to Yosemite. Now have numerous problems. Is it possible to go back in time with Time Machine and reinstall Snow Leopard? Then upgrade to Lion or Mavericks? Any other ideas on how I can exit Yosemite?

Once you get yourself back to Snow Leopard, if you still want to upgrade somewhat, I would suggest the following:
1. Get an external hard drive that you can use for experiments with new OS versions. You could partition it into 2 or 3 partitions. You could then clone your existing Snow Leopard system to one partition using Carbon Copy Cloner (well worth $40) or SuperDuper ($25).
2. Buy OS X Mountain Lion for $20, through the Apple online store (I don't think it's available through the App Store). Apple has decided to make it very difficult for anyone to get Mavericks unless they have already downloaded it.
You will receive two e-mails from Apple, one containing a PDF with a redemption code, and one with the password you will need to unlock the PDF. Using the code, you will download Mountain Lion from the App Store, where it will appear among your Purchased items.
After ML finishes downloading, its installer app will launch itself. When you see this launch screen, QUIT the install app immediately! Go to your applications folder, find the Install OS X Mountain Lion app, and copy it to a safe location outside of your Applications folder. Keeping one or more copies will allow you to reinstall without unnecessary aggravation if you later need or want to do that. At this point, you can re-launch the Installer in the Applications folder and let it run. You can install it on a clean partition on your external HD, or you can allow it to upgrade the Snow Leopard clone you created on your external drive, or you can do both. This should allow you to test how everything works for as long as you like.
3. If you left yourself a free partition on your test drive, try a clean install of Yosemite and set everything up from scratch (do not migrate anything). This will allow you to see whether your problems with it were related to something in your Snow Leopard system.

HT1338 How can I upgrade my MacBook Pro from OS X 10.5.8 to most recent Operating System ?

How can I upgrade my MacBook Pro from OS X 10.5.8 to most recent Operating System ?
I just bought a Ipad Air and realized than my MacPro does not support Icloud.

Upgrade Paths to Snow Leopard, Lion, Mountain Lion, or Mavericks
You can upgrade to Mountain Lion or Mavericks from Lion or directly from Snow Leopard. Mountain Lion can be downloaded from the Mac App Store for $19.99. To access the App Store you must have Snow Leopard 10.6.6 or later installed.
Upgrading to Snow Leopard
You can purchase Snow Leopard through the Apple Store: Mac OS X 10.6 Snow Leopard — Apple Store (U.S.). The price is $19.99 plus tax. You will be sent physical media by mail after placing your order.
After you install Snow Leopard you will have to download and install the Mac OS X 10.6.8 Update Combo v1.1 to update Snow Leopard to 10.6.8 and give you access to the App Store. Access to the App Store enables you to download Mountain Lion if your computer meets the requirements.
     Snow Leopard General Requirements
       1. Mac computer with an Intel processor
       2. 1GB of memory
       3. 5GB of available disk space
       4. DVD drive for installation
       5. Some features require a compatible Internet service provider;
           fees may apply.
       6. Some features require Apple’s iCloud services; fees and
           terms apply.
Upgrading to Lion
If your computer does not meet the requirements to install Mountain Lion, it may still meet the requirements to install Lion.
You can purchase Lion by contacting Customer Service: Contacting Apple for support and service — this includes international calling numbers. The cost is $19.99 (as it was before) plus tax. It's a download. You will get an email containing a redemption code that you then use at the Mac App Store to download Lion. Save a copy of that installer to your Downloads folder because the installer deletes itself at the end of the installation.
     Lion System Requirements
       1. Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7,
           or Xeon processor
       2. 2GB of memory
       3. OS X v10.6.6 or later (v10.6.8 recommended)
       4. 7GB of available space
       5. Some features require an Apple ID; terms apply.
Upgrading to Mountain Lion or Mavericks
To upgrade to Mountain Lion or Mavericks you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion or Mavericks (Free) from the App Store. Sign in using your Apple ID. Mountain Lion is $19.99 plus tax. The file is quite large, over 4 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
     OS X Mountain Lion — System Requirements
       Macs that can be upgraded to OS X Mountain Lion
         1. iMac (Mid 2007 or newer) — Model Identifier 7,1 or later
         2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) —
             Model Identifier 5,1 or later
         3. MacBook Pro (Mid/Late 2007 or newer) — Model Identifier 3,1 or later
         4. MacBook Air (Late 2008 or newer) — Model Identifier 2,1 or later
         5. Mac mini (Early 2009 or newer) — Model Identifier 3,1 or later
         6. Mac Pro (Early 2008 or newer) — Model Identifier 3,1 or later
         7. Xserve (Early 2009) — Model Identifier 3,1 or later
To find the model identifier open System Profiler in the Utilities folder. It's displayed in the panel on the right.
Are my applications compatible?
         See App Compatibility Table — RoaringApps.
     For a complete How-To introduction from Apple see Upgrade to OS X Mountain Lion.

If I upgraded my MacBook Pro from Snow Leopard to Lion via the web and now wish to erase the hard drive and restore it to factory settings to sell. How do I accomplish this?

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