How to erase and reinstall mac os 10.7

how do I erase and install Mac os 10.7

Install or Reinstall Lion/Mountain Lion from Scratch
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Erase the hard drive:
Select Disk Utility from the main menu and click on the Continue button.
After DU loads select your startup volume (usually Macintosh HD) from the left side list. Click on the Erase tab in the DU main window.
Set the format type to Mac OS Extended (Journaled.) Click on the Erase button and wait until the process has completed.
Quit DU and return to the main menu.
Reinstall Lion: Select Reinstall Lion/Mountain Lion and click on the Install button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.

Similar Messages

Having problems erasing and reinstalling Mac os x on 2007 MBP 15in

Hello
I am having some problems here and was hoping for some help.
Just recently here, I decided to erase and reinstall Mac Os X on my sister's 2007 MBP. She just recently got a new 15in MBP and wanted most of her content on the 2007 to be erased. Well... I did some reading around and found that the easiest way to do so was with the os X DVD that came with the thing. Problem is....I can't seem to find it for the 2007 MBP. So I decided to try the 2010 version. Went into the disk, ran disk utility, wiping the hard drive, did all the right steps according to Apple, and then rebooted to try get a clean version of OS X on. Well, problem is, it would come to the language select screen, but after that selection, it would come up with this error:
"Mac OS X can't be installed on this computer
If you want to restore your system from a Time Machine backup, click "Restore from Backup"
I've tried reformatting the HD several times and even tried restoring, but it wouldn't display my system restores...
So my quesiton is, is it becuase I have the wrong DVD that its not working or is there something else I"m missing?
Any help would be vastly appreacited (especially since its not my computer!)
Thanks!
Jordon Spronk

The install disks that come with a model of a Mac have certain hardware drivers for the computer and video card, you can't use another Mac's install disk.
However you can use the $29 Snow Leopard install disk, but it doesn't come with iLife, that's extra.

How to uninstall and reinstall mac os x...corrupt files...help!

i recently got a macbook pro to use for my photography and music and such, but i have never had a mac before and i'm used to pcs. i think a virus may have gotten on my computer because a couple days ago i went to upload a cd into itunes and i noticed that none of the songs i uploaded played. they showed up in the player but didn't actually play. so i restarted itunes and it said that my library was corrupt and that it had created a new one. the same thing happened in aperture. i exported some pictures from aperture to a file on my computer, and the pictures were there but half of them wouldn't display. so i restarted my computer, and aperture said it had to recover my folders, but it only recovered the folders that came with aperture...all of my library folders were gone. so i tried to import files from my computer into the aperture library and aperture just closed. this is actually the only way aperture will close--once it is open i have to force quit or just try to import files. since i have never worked with macs before the only way i can see to solve this problem is to burn all of my music and pictures to rewritable dvds (because those are the only files i really need) and then uninstall and reinstall mac os x. but i don't really know how to do this. any suggestions?

baltwo, you hung a couple of commas on the first two links making them non-functional, you may want to edit?
EDIT: wewillevolve, use these links:
http://www.apple.com/support/switch101
http://www.apple.com/support/mac101
-mj
[email protected]

Help: Tried using disk install to erase and reinstall mac osx

Could someone please help me. I just bought a second hand macbook pro off someone and upon recieving it realised they hadn't erased everything and their user account was still set up and active as administrator. This means i'll have issues down the track doing updates etc.
I googled how to hard reset the computer to start from scratch and followed steps. Basically they were
1. Restart computer whilst holding down the command and r buttons (which I did)
2. When the wifi connection box comes up connect to reliable wifi (done)
3. Then it said go into the disk utility and erase the mac os extended disk (the problem here is 1. the steps didnt specify that it should be the macintosh HD disk erased and 2. It should be the mac os extended (journaled) version, i've just fogured this out after a lot more searching as to why the reinstall of mac OSX wouldn't then work)
now i'm freaking out that i've done irreperable damage given that the mac OSX base system (mac OS extended (non-journaled)) has been erased. Can anyone please tell me if this can be reinstalled? Or what I should do next?

Afoster88 wrote:
...Mac OS Extended' and 'name: mac OS X Base System' both greyed out along with the erase and security options (The option to erase is unavailable, so im assuming it means the mac os extended has been erased in this partition) (capacity: 1.39GB, available: 224.7 MB, used 1.17GB)
whereas in the macintosh HD partition nothing has been greyed out (so the option to erase is there, which im assuming means it hasn't been erased)
(capacity: 319.73GB, available: 319.3 GB, used 425MB).
Does this help explain the situation?
That does help. The reason why the Macintosh HD partition is the only one where nothing is greyed out is that that's where your new OS X installation should be targeted (note that it's the only partition with room for a full OS X installation as well as your own files and applications). The option to erase is available in case you want to, for some reason, erase it again. Remember, you're booting from the Recovery HD and that's a partition on your HD too. You aren't allowed to erase the partition you booted from (hence, it's greyed out), and, since it's normally hidden, as are others, such as the EFI, it shouldn't be messed with anyway.

HT201240 Erased and reinstalled my operating system did i loos my lion ? if so how do i get it back?

I have erased and reinstalled my operating system in doing so i did not reinstall leopard but did install disc 1 an 2 and Snow Leopard! I had lion also! how do i tell if i have my lion dowm load installed or not and how can i recover my lion?

Try the following user tip:
Recovering your iTunes library from your iPod or iOS device

How to erase and start over on mac air

How to erase and start over on mac air

Click here and follow the instructions. If the computer originally shipped with Mac OS X 10.6.8 or earlier, when you reach step 5, connect its original thumbdrive, restart with the C or Option key held down, use the Disk Utility to erase the internal drive, and install a fresh OS.
(120051)

How do I reinstall backed up user folder after erase and reinstall of 10.4?

I had to erase and reinstall 10.4 on my g4 ibook. Prior to this I backed up my user folder on an external drive. Is there and easy way to get my machine the same as it was before the OS reinstall - library settings, files etc?

Is it assumed that apple users should have another apple machine and or a spare unused firewire hard-drive for system maintenance?!? Sure, if I were running it for buisness use, I'd have a mirrored drive, break the mirror, and upgrade one half of it, but this is the machine in my bedroom! I've got to say, I've rapidly going back of apple over these update QA issues. The fixes offered by people (and I appreciate the time and effort they put in to help others) so far all seem to involve creating other systems on spare drives, or using target mode from another mac. Come on Apple! You can't seriously expect your home users to have two machines, or a spare drive (personally, any drive I have, I use in something or other! I'd consider it a waste having a drive spare just for system upgrades to my Mac). It's about time Apple posted on this subject. It's unfair to expect your userbase to support your COMERCIAL OS for free so heavily.
I bought a mini because it was cheap, and I wanted to play with OSX. I bought the next OSX release because I had grown to like OSX. Now I'm rapidly going off it. I don't want to have to buy another device just to make it safe to upgrade.
Sorry for the Rant. Simon, this isn't meant as a criticism of your response. I just feel that apple should be more proactive here, having another disk is of course a good way to go, however, it takes the old TCO a bit to high for a home/play machine imho.
Anyone from Apple care to comment? (or will you simply edit out my post... afterall that would be easier than addressing the problem).

How to erase and install new version os Mac Os X?

Can someone tell me how to erase and install new copy of Mac OS X 10.5.8 ?? IS there a way to do this without CD?? I no longer have the disks and I cant find a way to get this done.. The reason I want to do this is because a 12 year old was using this computer for a long time and there is a lot of junk stuff on the disk, so I want to start from fresh.
Thank you in advance.
Yani.

Hi Yani,
Your out of luck without an Install Disc, & on dangerous ground also.
2 ways to go...
1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
   2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
      *Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
   3. Click the Erase tab.
   4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
   5. Select your Mac OS X volume.
   6. Highlight the drive, select Partition Tab, then Format type... MacOS Extended Journalled, select the Security Options button, choose Zero Out Data, Erase... after completion do a new install.
Or...
Open System Preferences>Accounts, unlock the lock, click on the little plus icon, make a new admin account, log out & into the new account.
In the same pref pane highlight your old account, click the little minus icon, then use Disk Utility to Secure Erase Free Space.

Erasing and reinstalling my mac pro hard drive

I have an older Mac Pro (2006 I think).
I want to erase and reinstall the hard drive. Once the disk is clean, is there a way to install OS directly to mountain lion? Or will I have to install from an ealier complete set of physical disks?

If it shipped with 10.4 and is a 2007 or earlier Mountain Lion is not supported, only up to Lion.
You download and save the Lion installer first and would need to have 10.6.8 to access the App Store.
Leave what you have as is, and just install a new system to another of the drive bays.

How can I perform a clean erase and reinstall on my iBook G4?

Hi everyone,
I have misplaced a help article that I successfully used to perform a clean erase and reinstall on my iBook G4.
I've been trying to get the erase and reinstall started by inserting the software restore cd (disk 1 of 8) that came with my computer, but the cd doesn't give the option to erase and restore.
When I try holding down "c" after restarting (right before I hear the dong sound), it just boots like it normally does and I still don't get the option to erase and install.
Can someone help?
Thanks so much,
Allison

I don't know fiberoptix. The above poster mentioning 8 disks would be talking about Panther, whereas in your case I am not sure what the second tiger DVD has on it.
I suggest you post a new topic in the Tiger forum here:
http://discussions.apple.com/forum.jspa?forumID=752
as you will get a better response if it is a new topic, and the Tiger forum has a big audience and your question will get more attention.
Good luck.
roam

Can i recover photo files lost when i wiped out my hard-drive and reinstalled mac os x?

Can i recover photo files lost when i wiped out my hard-drive and reinstalled mac os x? I know that when a computer is wiped cleaned that the info is still on the hard drive, how do I access it? Can I pay someone to access it? Long story short, everything was saved to my external hard drive except my photos, by mistake of course.

You have to stop using the drive immediately. Completely stop. Do not boot the computer from the drive.
File recovery software: Try using an application such as Data Rescue 3 - http://www.prosofteng.com/products/data_rescue.php or FileSalvage - http://subrosasoft.com, or one of the ones listed in the (old) link below. Some have free trial versions that let you see if the software will help before you decide to buy. You will also need a second hard drive equal to or larger in size than your first drive as a destination drive for recovered files.
http://data-recovery-software-review.toptenreviews.com/mac-recovery-software
It is critical that you do not use the computer or even turn it on until you have rescued your files. Files only have the directory reference to them removed when you empty the trash or otherwise delete them from a computer (unless you use secure erase, in which case they are gone forever or can only be potentially be recovered by very expensive means) and are still present on the computer. However, their space is marked as available to any other file creation done on the computer (even done by you booting the computer) and there is risk that your files will be overwritten by the computer.
Even if the above works, do not expect the results to be pretty or even 100% successful. Files will often lose their names and you will have to re-name them one by one.

How to erase and reset your Galaxy S6 (and why you'd want to)

Samsung has included some additional features to this function just in case you're doing something other than handing your Galaxy S6 off to another user.
How to erase and reset your Galaxy S6 (and why you'd want to) | Android Central

Hi,
I'm in the same boat. I have an older 13" black MacBook and bought a new 13" MacBook Pro. Your outline isnt' what I experience, yet it's similar to the Apple Article at
http://support.apple.com/kb/HT1820
They have the following steps:
These steps assume you have a Mac OS X 10.2.3 or later CD:
1. Insert the Mac OS X CD.
2. Restart the computer.
3. Immediately after the startup sound, press and hold the "C" key to start up from CD.
4. When the Installer screen appears, do not click Continue. Instead, choose Installer > Open Disk Utilities.
5. Select the hard drive to erase.
6. Click the Erase tab.
7. Select the volume format from the Volume Format pop-up menu.
8. Click Options.
9. Select the checkbox for "Zero all data".
10. Click OK.
11. Click Erase
I'm not sure if I'm obtaining what I want; Zero erase then reinstall. I'm using my OS X Leopard Install Disk. I did steps 1 - 3. As I held the "C" key, I got a gray screen with the Apple logo and a spinning icon below. It did this for about 3 minutes (my "c" holding finger was getting sore )
I never got a step 4. It went straight to "Choose a Language" I did: English
I never got choices 5 to 11.
I got the screen showing the drive and asking if I want to install. I continued.
I then opened the "Options" tab. There I could erase existing OS install and then reinstall. There was never a choice for "Zero All Data."
I'm currently letting it do it's thing and it's in stalling, about 26 mins to go, already been about 20 mins.
Did I miss something, or is the "zero" option not the same for Leopard?
Much thanks,

How to uninstall and reinstall Adobe InDesign CS5?

My Adobe InDesign CS5 stopped opening properly. Upon startup all the menu items were grayed out and unaccessible. Adobe Chat support advised me to uninstall and reinstall CS5.
My other Adobe programs are working fine. (CS5 photoshop, illustrator, acrobat, etc.)
MacBook Pro OS10.9.3
Anyone know how to uninstall and reinstall CS5?
Unfortunately Adobe chat service no longer supports this function on this older software.
Thanks for your help.

before you go to the trouble of uninstalling/reinstalling--try this (it's called resetting the preferences)
OOPs--I forgot that I was in the indesign forum
There is a quick and easy method for doing this using the keyboard: close and relaunch InDesign, and IMMEDIATELY hold down Ctrl + Alt + Shift (Windows) or Cmd + Ctrl + Opt + Shift (Mac), and respond in the affirmative to the dialog asking if you really want to replace the preferences. There are two downsides to this method, however. First, you must be extremely fast on the keyboard (if you don’t see the confirmation prompt, you were too slow), and second, anytime you replace the preferences you will lose most program customizations, and using the keyboard method leaves you with no backup to restore them when the problem turns out to be something else.
My preferred method is to CLOSE INDESIGN and do a “manual” prefs replacement, which consists of finding and renaming the two files which make up the preference set: InDesign Defaults and InDesign SavedData. BOTH of these files should be replaced at the same time. You can delete them, but renaming or moving them will give you the opportunity to copy them back in the event that new prefs doesn’t cure your issue. When you restart ID, the program will look for these two files, and when they are not found, a new default set will be written.
source: Troubleshooting 101: Replace, or "trash" your InDesign preferences

Erasing and installing Mac OS 10.5.8

I have just had to erase my hard drive and reinstall Mac OS 10.5.8. It has been transferring files from my external hard drive and seems to be stuck on "Transferring files to support applications - Less than one minute remaining" for 8 hours (overnight)! What should I do???

Try using Disk Utility t repair your disk
   1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
   2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
      Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
   3. Click the First Aid tab.
   4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
   5. Select your Mac OS X volume.
   6. Click Repair. Disk Utility checks and repairs the disk.
Then reboot and repair permissions from your internal drive.
Miriam

Lion erase and reinstall by the Apple Store

Ok, I'll admit I'm a recent PC crossover so that qualifies me as a Newbie. Today I took my MacBook to the apple store for an erase and reinstall due to about 20gb of space was missing on my HD. My latest backup was done the day before I went back to Apple to reinstall Lion. After I restored my data from the backup, the address book app and the app store app are both missing. My address book data is on iCloud so I'm not that concerned about the data but I would like to get the app back on my MacBook. Any help on how to do this would be greatly appreciated. Thanks....

I'm not aware of any easy way to reinstall an OS X application in Lion short of reinstalling Lion. You can do that without erasing the drive again, but there is the time it takes to reinstall.
I don't suppose you have a copy of the Lion installer saved on your computer or purchased the Apple USB Lion flash drive installer?
Reinstalling Lion Without Erasing the Drive
Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu.
Reinstall Lion: Select Reinstall Lion and click on the Continue button.
Note: You can also re-download the Lion installer by opening the App Store application. Hold down the OPTION key and click on the Purchases icon in the toolbar. You should now see an active Install button to the right of your Lion purchase entry. There are situations in which this will not work. For example, if you are already booted into the Lion you originally purchased with your Apple ID or if an instance of the Lion installer is located anywhere on your computer.

How to erase and reinstall mac os 10.7

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