Fresh Install of Lion - anything to be aware of?

I have installed Lion as an upgrade (and copied off the installer to an external HDD). The Emergency disk partition is there - and I assume it works.
Apart from backing up essential data; is there anything I should be aware of if I want to do a fresh install of Lion by erasing the HDD with the system on it and then booting from the Emergency partition?

To answer my own question a bit further. The following two links both show how to install Lion without the need to first have Snow Leopard installed.
http://www.informationweek.com/byte/howto/personal-tech/desktop-os/231002151
http://www.eggfreckles.net/notes/installing-lion-clean/

Similar Messages

Fresh install of Lion & migration from internal drive

Hello,
I recently did a fresh install of Lion 10.7.1 from a bootable DMG of Lion 10.7.1 I downloaded from the app store. Before I installed Lion I used disk utility from the installer to format my system drive in order to get a fresh install.
The installation went fine and I am now booted into 10.7.1.
I am trying to use Migration Assistant to migrate files over from a Time Machine backup that is on a separate internal hard drive in my Mac Pro. Unfortunatley MA does not recognize the drive as a source. The hard drive is visible to me in Finder, yet when I dig deep into the structure some of the folders are not accessible to me since I do not have read/write permission. I had to enable the permission for the drive initially but that does not cascade to the entire contents of the drive. I enabled root access in attempt to get around this didn't work.
Is my problem one of permissions or what else?
Thanks!

Try Lion Community and TimeMachine
http://www.apple.com/support/lion
http://www.apple.com/support/timemachine
Me, and I hope others, clone your system first! keep your drive you have even, as is, you may want or need 10.6.8 still. Format a new drive for Lion instead.
As for what TimeMachine holds and why Setup Assistant on first boot wouldn't import anything.... sorry.

I have a fresh install of Lion and upgraded to Safari 6.0.5

I have a fresh install of Lion and upgraded to Safari 6.0.5 installed all patches and updates. Crashes immediately upon launch. Sig_Sev. Error.

Try a safe boot by holding down shift key during boot
Allan

Fresh install of Lion, what happens to iPhone Apps?

HI all,
I want to do a fresh install of Lion on my Mac. What is going to happen to all of my iPhone and iPod touch apps when I do this? Is there a way to back them up and then add them back to iTunes when I'm done?
I already have all of my photos, movies, music, Mac app .dmg's and documents backed up on a 1TB drive (not time machine, just manual). But what about my iPhone Apps?
I have spent a lot of money on these things and I do not want to have to buy them all again.

Try a safe boot by holding down shift key during boot
Allan

CAN'T FRESH INSTALL MOUNTAIN LION

I have a mid 2010 17" MacBook Pro.
Had been using it for years till now.
Recently, I reinstalled mountain lion and boot camp (for web ATM).
The first time it couldn't boot up was 2 weeks ago. No matter how I try, just couldn't boot up after I used **** windows.
I thought it was virus from windows, so I re-do it again.
This time, I can't even fresh install mountain lion, it says there's some problem with the installation program, and ask me to try again.
I even made a flash stick of ML, and says the same thing.
I tried all the disk utility stuff. verify, recovery, clean.
And I used the Apple Hardware Test tool to test it, says nothing wrong with my mac. (I did extention test as well.)
My Hardware Description:
Name: MacBook Pro
Model: MacBookPro6.1
CPU: intel Core I5
Core Number:2
CPU Speed: 2.53 Hz
L2 Cache: 512 KB
L3 CPU flash memory: 3 MB
BOOT ROM VERSION: MBP61.88z.0057.B0F.1112091028
System Serial: C02DXOXODC79
What happened to my MBP???? Please help~
Thanks in advance if any reply.

Boot up in recovery mode, erase the HD, and restore the OS. Details in Recovery and About OS X Recovery. Also, see Internet Recovery

IPhoto won't open after fresh instal of Lion!

I recently erased my hard drive and did a fresh install of Lion as I am giving my MacBook Pro to my brother as a Xmas present. I used a USB pen to reinstall Lion. I used my time MAchine backup to bring over iPhoto, iMovie and Garageband. Everything works apart from iPhoto. It says "iPhoto cannot be opened because of a problem. Thing is iLife came bundled on my Mac and i did not have to buy it from the App Store. Everything is up to date but it just won;t open. Can anyone help explain why this maybe and help me fix the problem?
Thanks
Matt

iPhoto cannot be opened because of a problem
Matty....
Try holding down the Command + Option keys then launch iPhoto.
Select: Repair the iPhoto Library Data base then click Rebuild.

Fresh install mountain lion

I am having to many crashes on my Mountain Lion (upgraded from Snow Leopard) and want to reinstall Mountain Lion and see if this doesn't work. My Mac crashed about once or twice a week and most recently this caused my Outlook for Mac to be corrupted. Tied to rebuild DB but it is not working.
How can I fresh install Mountain Lion removing all from my HDD and recovering my data safely?

Found my old Mail, so basically back to normal.
However had two crashes since I've done everything and now I am concerned that my Mac issue might be hardware related:
Interval Since Last Panic Report: 98 sec
Panics Since Last Report:          1
Anonymous UUID: 23CD7216-4D50-7B4A-8707-9F5D58539F0F
Thu Oct 11 08:09:45 2012
panic(cpu 0 caller 0xffffff7f84da8b25): NVRM[0/1:0:0]: Read Error 0x00000100: CFG 0xffffffff 0xffffffff 0xffffffff, BAR0 0xd2000000 0xffffff80a3c66000 0x0a5480a2, D0, P3/4
Backtrace (CPU 0), Frame : Return Address
0xffffff80800daf80 : 0xffffff800461d626
0xffffff80800daff0 : 0xffffff7f84da8b25
0xffffff80800db080 : 0xffffff7f84ea24b3
0xffffff80800db0e0 : 0xffffff7f84ea2527
0xffffff80800db150 : 0xffffff7f851b7853
0xffffff80800db290 : 0xffffff7f84ec8659
0xffffff80800db2c0 : 0xffffff7f84db28da
0xffffff80800db370 : 0xffffff7f84dadfac
0xffffff80800db560 : 0xffffff7f84daf1d8
0xffffff80800db630 : 0xffffff7f85e1345e
0xffffff80800db6f0 : 0xffffff7f85e4400f
0xffffff80800db770 : 0xffffff7f85e28b4a
0xffffff80800db7d0 : 0xffffff7f85e29415
0xffffff80800db820 : 0xffffff7f85e2980f
0xffffff80800db8c0 : 0xffffff7f85e2a239
0xffffff80800db900 : 0xffffff7f85de5e81
0xffffff80800dba80 : 0xffffff7f85e267fe
0xffffff80800dbb40 : 0xffffff7f85de498a
0xffffff80800dbba0 : 0xffffff8004a65bc9
0xffffff80800dbbc0 : 0xffffff8004a67170
0xffffff80800dbc20 : 0xffffff8004a64b8f
0xffffff80800dbd70 : 0xffffff80046981e1
0xffffff80800dbe80 : 0xffffff8004620aed
0xffffff80800dbeb0 : 0xffffff8004610448
0xffffff80800dbf00 : 0xffffff800461961b
0xffffff80800dbf70 : 0xffffff80046a5b16
0xffffff80800dbfb0 : 0xffffff80046ced53
      Kernel Extensions in backtrace:
com.apple.NVDAResman(8.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f84d41 000->0xffffff7f85043fff
dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f84caf000
dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f84d2d000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f84cea000
com.apple.nvidia.nv50hal(8.0)[9F3D09B5-3158-3D9E-BDA3-E71576AAD3B7]@0xffffff7f8 5051000->0xffffff7f85373fff
dependency: com.apple.NVDAResman(8.0.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f84d 41000
dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f84caf000
         com.apple.GeForce(8.0)[2E56ED9A-D848-3795-9E52-56BABDC9000C]@0xffffff7f85dd8000 ->0xffffff7f85e9afff
dependency: com.apple.NVDAResman(8.0.0)[A4C53A36-22B6-3075-82B9-9DE612A9C015]@0xffffff7f84d 41000
dependency: com.apple.iokit.IONDRVSupport(2.3.5)[86DDB71C-A73A-3EBE-AC44-0BC9A38B9A44]@0xff ffff7f84d2d000
dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f84caf000
dependency: com.apple.iokit.IOGraphicsFamily(2.3.5)[803496D0-ADAD-3ADB-B071-8A0A197DA53D]@0 xffffff7f84cea000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
12C60
Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide: 0x0000000004400000
Kernel text base: 0xffffff8004600000
System model name: MacBookPro6,2 (Mac-F22586C8)
System uptime in nanoseconds: 590434395070
last loaded kext at 55988573983: com.apple.driver.AppleHWSensor   1.9.5d0 (addr 0xffffff7f86a31000, size 36864)
last unloaded kext at 254906129098: com.apple.driver.AppleUSBUHCI          5.2.5 (addr 0xffffff7f85637000, size 65536)
loaded kexts:
com.apple.driver.AppleHWSensor   1.9.5d0
com.apple.driver.AudioAUUC           1.60
com.apple.driver.AGPM        100.12.69
com.apple.filesystems.autofs            3.0
com.apple.driver.AppleMikeyHIDDriver     122
com.apple.driver.AppleHDA 2.3.1f2
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.GeForce    8.0.0
com.apple.driver.AppleIntelHDGraphics    8.0.0
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport            4.0.9f33
com.apple.driver.AppleMikeyDriver           2.3.1f2
com.apple.driver.SMCMotionSensor           3.0.2d6
com.apple.driver.AppleIntelHDGraphicsFB            8.0.0
com.apple.driver.AppleSMCLMU     2.0.2d0
com.apple.driver.AppleMuxControl            3.2.11
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.driver.AppleSMCPDRC   1.0.0
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.driver.AppleLPC 1.6.0
com.apple.iokit.IOUserEthernet       1.0.0d1
com.apple.iokit.IOBluetoothSerialManager            4.0.9f33
com.apple.Dont_Steal_Mac_OS_X      7.0.0
com.apple.driver.ApplePolicyControl          3.2.11
com.apple.driver.AppleUSBTCButtons        235.4
com.apple.driver.AppleUSBCardReader     3.1.0
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless      1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1
com.apple.BootCache            34
com.apple.driver.AppleUSBTCKeyboard    235.4
com.apple.driver.AppleIRController            320.15
com.apple.iokit.SCSITaskUserClient            3.5.1
com.apple.driver.XsanFilter 404
com.apple.iokit.IOAHCIBlockStorage           2.2.2
com.apple.driver.AppleFWOHCI      4.9.6
com.apple.driver.AppleUSBHub      5.2.5
com.apple.driver.AirPort.Brcm4331           602.15.22
com.apple.driver.AppleAHCIPort     2.4.1
com.apple.iokit.AppleBCM5701Ethernet   3.2.5b3
com.apple.driver.AppleUSBEHCI     5.4.0
com.apple.driver.AppleSmartBatteryManager      161.0.0
com.apple.driver.AppleEFINVRAM 1.6.1
com.apple.driver.AppleRTC 1.5
com.apple.driver.AppleACPIButtons           1.6
com.apple.driver.AppleHPET           1.7
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.kext.triggers         1.0
com.apple.driver.DspFuncLib          2.3.1f2
com.apple.iokit.IOAudioFamily         1.8.9fc10
com.apple.kext.OSvKernDSPLib      1.6
com.apple.nvidia.nv50hal    8.0.0
com.apple.NVDAResman      8.0.0
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport       4.0.9f33
com.apple.driver.AppleSMBusPCI   1.0.10d0
com.apple.iokit.IOFireWireIP           2.2.5
com.apple.driver.AppleBacklightExpert     1.0.4
com.apple.driver.AppleSMBusController    1.0.10d0
com.apple.driver.AppleHDAController        2.3.1f2
com.apple.iokit.IOHDAFamily           2.3.1f2
com.apple.driver.IOPlatformPluginLegacy 1.0.0
com.apple.driver.IOPlatformPluginFamily 5.2.0d16
com.apple.iokit.IOSurface     86.0.3
com.apple.iokit.IOSerialFamily         10.0.6
com.apple.iokit.IOBluetoothFamily 4.0.9f33
com.apple.driver.AppleSMC 3.1.4d2
com.apple.driver.AppleGraphicsControl     3.2.11
com.apple.iokit.IONDRVSupport      2.3.5
com.apple.iokit.IOGraphicsFamily    2.3.5
com.apple.iokit.IOSCSIBlockCommandsDevice       3.5.1
com.apple.iokit.IOUSBMassStorageClass     3.5.0
com.apple.driver.AppleUSBMultitouch       235.7
com.apple.iokit.IOUSBHIDDriver     5.2.5
com.apple.driver.AppleUSBMergeNub       5.2.5
com.apple.driver.AppleUSBComposite        5.2.5
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.IOAHCISerialATAPI 2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily   3.5.1
com.apple.iokit.IOFireWireFamily    4.5.5
com.apple.iokit.IO80211Family       500.15
com.apple.iokit.IOUSBUserClient     5.2.5
com.apple.iokit.IOAHCIFamily          2.2.1
com.apple.iokit.IOEthernetAVBController 1.0.2b1
com.apple.iokit.IONetworkingFamily           3.0
com.apple.iokit.IOUSBFamily            5.4.0
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     28.21
com.apple.driver.AppleACPIPlatform         1.6
com.apple.iokit.IOPCIFamily 2.7.2
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto     1.0
Model: MacBookPro6,2, BootROM MBP61.0057.B0F, 2 processors, Intel Core i5, 2.4 GHz, 4 GB, SMC 1.58f15
Graphics: Intel HD Graphics, Intel HD Graphics, Built-In, 288 MB
Graphics: NVIDIA GeForce GT 330M, NVIDIA GeForce GT 330M, PCIe, 256 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
Memory Module: BANK 1/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80AD, 0x484D54313235533642465238432D47372020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x93), Broadcom BCM43xx 1.0 (5.106.98.81.22)
Bluetooth: Version 4.0.9f33 10885, 2 service, 11 devices, 1 incoming serial ports
Network Service: Ethernet, Ethernet, en0
Serial ATA Device: Hitachi HTS545032B9SA02, 320,07 GB
Serial ATA Device: MATSHITADVD-R   UJ-898
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfa100000 / 2
USB Device: Apple Internal Keyboard / Trackpad, apple_vendor_id, 0x0237, 0xfa120000 / 5
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0xfa130000 / 4
USB Device: BRCM2070 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0xfa110000 / 3
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8218, 0xfa113000 / 7
USB Device: hub_device, 0x0424 (SMSC), 0x2514, 0xfd100000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0xfd120000 / 4
USB Device: Built-in iSight, apple_vendor_id, 0x8507, 0xfd110000 / 3

How To Do Fresh Install of Lion (Not ML)? ML Bricked My Mini

I am at the point that I need to reinstall Lion 10.7.4 onto my Mini that I attempted to install ML on. None of the recovery from Apple cures the ML panics after the several ML install attempts.
I need to do a fresh install of Lion, but need instructions.
Thanks.

If your Mini came with Lion then you can use Internet recovery:
http://support.apple.com/kb/HT4718

IMac, Fresh Install Of Lion via Recovery HD

Hi,
A few weeks ago my iMac had a serious bug with iMovie. So now I want to prefrom a fresh install of Lion. I have already backed up my data and know how to get to recovery.
But I don't know which drive to erase.
Do I erase The "500.11 GB ST3500418ASQ Media" or the one below it "Macintosh HD"????

Hi,
Macintosh HD is normally it, (the Boot Drive), & quite sure it is for you.
Are you sure you need to erase it though?

Cannot Do Fresh Install Mountain Lion on My MBP

Hello everyone!
I just wanted to do fresh install on my MBP.
It had OS X 10.8.3 before. And then I wanted to do fresh install using USB bootable Mountain Lion 10.8.2.
But when I reboot from USB, there's an error like this: "There was a problem installing "Mac OS X"."
What should I do? I'm really confused.
I use MBP late 2011 actually.

Boot up holding command-r keys into your Recovery Volume.
The screen should give you these choices...
Restore from TM backup
Reinstall Mac OS X
Get help online
Disk Utility
Choose re-install OS X. This will be internet recovery and will take a while depending on your internet speed.

Cannot Fresh Install Mountain Lion on SSD

Hi I am new to macs and the first thing I want to do on my mac is install the Mac OSX onto my old SSD from my Windows machine. I have been having great difficulty so far! I created the mac osx dvd following the instructions here. I then took out my old HDD and put in the old SSD, I loaded up from the macosx dvd i created. I then erased the ssd drive as mac extended journal. I then installed the OS. It seemed to work, I loaded up mac osx mountain lion and logged in.
The only thing was that whatever you did on the screen made the spinning thinking wheel appear for far too long. Even opening the finder windows took a while.
I thought the fresh install must have gone funny so I just went through the process gain and tried to install mac osx again. Now I cannot even get the installer to finish! It just stops and says its failed. I have tried wiping the drive again and starting again but now every time the installer fails. Like the first time I tried to install it somehow left some damage or mess behind. Well I hope its not the SSD that is faulty I tested it by plugging it in to another computer with a hard drive docking thing. It seemed to read and write fine!?
I am very confused, could it be a dodgy dvd? I burned it and it seems to work fine, burned it straight from the download so could the download be corrupted?
Its a pain as they are dual layered DVDS and cost a fair amount! Its so frustrating as its my new mac and I just want to get it up and running and do some editing I thought it would all run smoothly, what with it being Mac and all.. :-(
Any help would be very much appreciated! Thanks!

Hmm... it seems as if you went through the correct procedures... here's what I'd do, though...
Buy an inexpensive enclosure for your 'old' hard drive (OWC is a good source) and keep the SSD installed in your MBP. Boot from the 'old' drive.
Use Disk Utility to reformat the SSD - format it as "Mac OS Extended (Journaled)" with a single GUID partition.
Use Carbon Copy Cloner to clone your old drive to the SSD. You'll have the option of creating the Recovery partition - do so.
Beofre rebooting, choose the SSD as your Startup Disk under System Preferences. Then reboot. You should boot into your (speedy) SSD now.
Let me know if this doesn't work.
Clinton
BTW: I prefer creating a USB flash drive (8GB+) as a bootable installaton drive rather than a DVD. I've made quite a few of them using Lion DiskMaker (similar process that you describe - just automated).

Cannot make a fresh install of Lion on my Macbook Pro.

Whenever I try to reinstall Lion through the Recovery HD menu, the installation goes fine up until a moment when it prompts me that if I would really like to cancel the installation procedure, even though I did not cancel it.
I click to not cancel it, but it does it anyway.
How can I work around this?
Also, when doing reinstallation, I deleted completely my Mac HD. The only difference there is between the current installed OS HD is that it is Journaled and Case-Sensitive, whereas the fresh install I wish to do is only Journaled.
Thanks in advance.

Without Snow Leopard you cannot purchase or download Lion, so you haven't much choice unless you wait until Apple releases their USB flash drive with Lion later this month - $69.00.

Fresh Install of Lion - Questions

I plan to format my MBP and install Slow Leopord from the disk, then install Lion. I want to start over fresh in order to eliminate some annoying problems I've been having. However, before doing this I have a few questions I hope some of you can help with.
1. iPhone - how do I back up all my iphone content so when I connect it to iTunes on the fresh Lion install that it won't want to erase everything on my iPhone. I want to make sure that when I connect the first time it won't do the whole "You've never connected to this computer before...." Is there a way to back up my iphone content on bot the iPhone and iTunes and somehow put it on the fresh installed computer? (I sure hope that makes sense).
2. iTunes - Can I back up my iTunes media and import it back into the fresh install of itunes? If so, how?
Much Thanks for any help.

Hi PsychTech,
Sounds like you have an Xserve Cluster Node which doesn't come with a CD/DVD drive. How many drive bays does it have?
If it is then you'd be stuck to running 10.5 on it. Mountain Lion will only install on the 2009 Xserve which does have a DVD drive in the top right corner.
To be able to get into the servers you could do the following.. Find a copy of Tiger or Leopard on CD/DVD.. Either create a bootable image of it and start from a USB/Firewire Hard disk. When you boot up DO NOT go to install OS X but instead go to the Utilities menu and you'll find an option to reset the password which will at least get you in. You can do this with the client version or server version of OS X.
Hope that helps
Beatle

Fresh Install of Lion

I may replace the hard drive on my late 2008 MacBook Pro. I am on OSX10.5.8. Actually I am hoping that with a complete wipe of the drive I can solve some of the minor problems that are annoying me. Slowness, heating up etc… Nothing major, but after nearly 4 years of heavy use some gremlins are creeping in. I have performed all the maintenance and diagnostics that should be run but never wiped the drive. I have upgraded the ram and know that my machine meets the minimum requirements for Lion.
Since I have full backups in Time Machine can I just buy the OSX Lion Thumb drive and do a fresh install?
I see that the license agreement does call for Snow Leopard but some on this forum and elsewhere say you can skip it if you do a complete fresh install. Will doing this cause any problems for me in the future?
Thanks

but you will always need to use the USB flash drive because you will not have Snow Leopard and cannot download Lion.
That's an interesting corollary.
Surely you can open a MAS account and register the purchase? Otherwise, it is obviously better to purchase the 10.6.8 disk and install that first, then purchase Lion, so that you have a MAS history and in the future can re-download if necessary.
What happens to the Recovery HD process in your instance, with only a USB?

How do i use an old time machine with a freshly installed Mountain Lion

I recently formatted my HD, that was on OS Lion, and installed a fresh copy of OS Mountain Lion. Is it possible to still use my time machine machine backup (from before i formatted my hard drive) with the newly formatted HD running Mountain Lion? or do i just start from scratch again.
Thanks for the responses
MacBook Pro 2010
OS 10.8 (mountain Lion)

This is the closest thing to my query that I have been able to find. I recently installed ML on my late 2011 MBP. I have tons of backups from Lion and I want to continue backing up ML. I have hesitated to do so as I fear that I will not be able to recover my data and settings in the event that I decide to downgrade to Lion. If I was to downgrade back doe Lion; could I use a ML TM backup to recover my files and settings?

Fresh Install of Lion - anything to be aware of?

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