Upgrade leopard to lion
Hello,
I have a 2006 Mac Mini with Leopard (10.5.x). Couple of questions:
1. Does Lion support this Mac?
2. I have purchased Lion for a Mac Book Pro I have. Can I upgrade the Mac Mini directly to Lion, or do I have to purchase Snow Leopard upgrade as well?
Thanks,
Yair.
If you have a Core 2 Duo processor then, yes, it will run Lion. If not, then you are limited to using Snow Leopard.
If you have Snow Leopard installed on the Mini, then you can log into the App Store using your Apple ID and download Lion at no additional charge. If you have the Lion installer application then you can make a USB flash drive installer for Lion to use on your computers. If you make a USB installer for Lion then you can upgrade the Mini without installing Snow Leopard.
How to Install Lion Successfully - You must have Snow Leopard 10.6.7 or 10.6.8 Installed
A. Repair the Hard Drive and Permissions:
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. Then select Disk Utility from the Utilities. 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 installer. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.3.) if DW cannot fix the drive, then you will need to reformat the drive and reinstall Snow Leopard.
B. Make a Bootable Backup Using Restore Option of Disk Utility:
Open Disk Utility from the Utilities folder.
Select the destination volume from the left side list.
Click on the Restore tab in the DU main window.
Check the box labeled Erase destination.
Select the destination volume from the left side list and drag it to the Destination entry field.
Select the source volume from the left side list and drag it to the Source entry field.
Double-check you got it right, then click on the Restore button.
Destination means the backup volume. Source means the internal startup volume.
C. Important: Please read before installing:
If you have a FireWire hard drive connected, disconnect it before installing the update unless you will boot from this drive and install the update on it. Reconnect it and turn it back on after installation is complete and you've restarted.
You may experience unexpected results if you have installed third-party system software modifications, or if you have modified the operating system through other means. (This does not apply to normal application software installation.)
The installation process should not be interrupted. If a power outage or other interruption occurs during installation, use the standalone installer (see below) from Apple Downloads to update. While the installation is in progress do not use the computer.
D. To upgrade to Lion:
Purchase the Lion Installer from the Mac App Store. The download will start quickly. Lion is nearly 4 GBs so a fast internet connection is essential. Download time could run upwards of 4 hours depending upon network conditions and server demands at the time.
Boot From The Lion Installer which is located in your Applications folder.
Follow instructions for installation.
Similar Messages
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How do i upgrade leopard to lion?
how do i upgrade leopard to lion?
First you would need to buy Snow leopard - call Apple to get an install disk. Then, since Lion is no longer availaable at the app store, you can place the order for that with Apple as well - they will email you a redemption code to use at the app store. So, you will need to install Snow Leopard, update it to the latest version (which includes the app store), and then go to the app store to redeem/download Lion.
But...... first make sure your machine meets the requirements:
http://support.apple.com/kb/HT4949
And, the 2 GB RAM mentioned are an absolute minimum - 4 GB would be a far more realistic minimum. -
Phones are unavailable for me. How can i upgrade Leopard to Lion?
The only thing stopping me from purchasing Snow Leopard is my self imposed isolation without access to friends or relatives who can make a phone call for me. It is my choice and hardly Apple's fault. I left upgrading to Snow Leopard until long after it was withdrawn from sale from the on-line Apple Store. Thanks to Klaus1 for enlightening me. He is a good friend.
I can hardly claim Apple should make a simple product already in existence available to me via the same methods much of its other products are at present, through their existing storefront in their existing website. I have no right to point out that this product is advertised with a price point and necessary in the path for upgrading to the most recent product Lion and is key to being able to purchase apps once that is functional with my OS.
But actually it falls under the jurisdiction of handicap access, and this problem is as always still an issue, not just for me, but many. It is not isolation that drives this query, but a demand for equal access.
It is not like a person makes a choice to lose hearing. I did not impose my difficulties, they are in fact my constraints. I do not own a functioning phone for obvious reasons. I am delighted to own an ipad. I am here fighting for the opportunity to upgrade my laptop using a method that has been available to me for years... i know it may be easy for ya'll to call but i cannot. I am writing all this to appeal for an intelligent response to solve my very real problem.
Who knows the best link or email where i can type a message and get support help... I have sent several messages in varying locations with no response as of yet.
Who has been on the phone call to get this upgrade, can you confirm what i have heard, that there is a link to purchase the product?
Maybe there is a support line i can mail a text to.
Please don't tell me to call or get a friend to call. This is not a solution, it is a way of skirting around the problem and it unfortunately alienates many people with a myriad of complex constraints who for whatever reason cannot use a phone.test
EDIT: Sorry for the confusion, but there's a serious problem with the forums at the moment -- many posts don't appear for all users. Sometimes you must make a new post for the previous ones to show up.
That's why Klaus didn't see my post (and he meant a white disc, not black).
Long Haired Artist wrote:
The price point of $19.99 is advertised here:
http://www.apple.com/osx/how-to-upgrade/
I would not know the price if it were not advertised. Posting a price and intent to sell is advertising.
I suspect Apple's legal department would not agree. If you wish to pursue that issue, good luck, but this is certainly not the place.
I don't see how this is a policy issue. I see it as an oversight, and would like to have this thread available to others who share my situation of not having access to a phone.
It's clearly not an oversight. When Mountain Lion was released, and Snow Leopard was dropped from the online store, many folks complained. Only after a month or so was it offered by phone.
Again, back to my question, does anyone have any experience with the phone call, leading to a link, what is that link, or does anyone know a way to get customer service via email.
There are no public links or email for sales, only specific support sites, such as: http://www.apple.com/support/contact/
Message was edited by: Pondini -
Possible to upgrade Leopard to Lion without SL?
My Macbook Air has Leopard 10.5.8. Since OS X 10.7 Lion will be a Mac AppStore purchase, do i have to upgrade to Snow Leopard before i can upgrade to OS X Lion? Or will there be a way through Leopard?
Is it possible / legal to upgrade my MB Air using the Snow Leopard install discs that came with my iMac ?Yes, buy the Lion DVD and install from DVD directly.
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Upgrade leopard to Lion CS5 compatible?
I am running CS5 on OS X leopard, will it still work if I upgrade to OS X Lion?
I believe Leopard is osX 10.5, Snow Leopard is 10.6, and Lion is 10.7....
Still good? -
Macbook 2006 upgrade to Leopard, Snow Leopard, or Lion?
I own a white Macbook pro 2006 core 2 duo OS x 10.4 tiger. More than anything, I want to update this computer. Is there any possible way to upgrade to leopard, snow leopard, or lion?
You can upgrade from 10.4 to10.6 with no problems. Any program that runs under 10.4 will run under 10.6. You might have to upgrade some drivers for printers, etc.... And you will have to install Rosetta if you have any Power PC applications http://www.macobserver.com/tmo/article/snow_leopard_installing_rosetta/ I recently upgraded an older Core Duo MacBook (1,1) from 10.4 to 10.6. If you only want iPhoto or other single apps from iLife '11 you can get them from the App Store after you've upgraded to 10.6.6. iPhoto, iMovie or Garage Bandfor $15 each and Pages, Keynote or Numbers from iWork '09 for $20 each.
You can order a Snow Leopard10.6 install disk for $29 as long as you have at least1gb of RAM and 5gb offree space on your hard drive. http://store.apple.com/us/product/MC573Z/A?mco=MTY3ODQ5OTY
A 10.5 Leopard disk willrun you over $100
Once you are at 10.6.8 you can buy Lion from the App Store if you have at least a model 2,1 MacBook. Lion will require at least 2gb of RAM but really needs 4gb to run smoothly. Also Lion doesn't run any PowerPC programs. To see if you have any Power PC programs go to the Apple in the upper left corner and select About This Mac, then click on More Info. WhenSystem Profiler comes up select Applications under Software. Then look under kind to see if any of your applications are listed as Power PC. Universal and Intel will run under Lion.
Before Mac switched to Intel processors they used Power PC processors from 1994 to 2005. Power PC 601 through 604, G3, G4 and G5. Applications written for the Power PC processors need an application called Rosetta to run on Intel processors. This was part of the Operating System in 10.4 and 10.5 but was an optional install in 10.6. With10.7 Lion Apple dropped support for Power PC applications. -
I am running Snow Leopard and have a Mobile Me account. My Mobile Me account expires at the end of June. I have been told that I will need to buy the Lion upgrade to run icloud on my imac, but I am aware that Lion is due to be replaced by Mountain Lion this summer. I don't want to have to buy two up grades! Will Mountain Lion be released before my mobile me account expires? If not and I buy the Lion upgrade, will I be able to upgrade it to Mountain Lion, free, in view of the fact that I will only have had Lion for a very short time and could not avoid this purchase??????
HI...
We have no way of knowing exactly when Mountain Lion will be released. Most likely, if you upgrade to Lion now you'll be able to upgrade to Mountain Lion, but the actual minimum requirements are unknown at this time.
Lion is only $29.99 plus any applicable taxes and fees and available from the App Store, or you can purchase the thumb drive > OS X Lion USB Thumb Drive - Apple Store
Make sure your Mac meets Lion's requirements.
Mac computer with an Intel Core 2 Duo, Core i3, Core i5, Core i7, or Xeon processor
2GB of memory
OS X v10.6.6 or later (v10.6.8 recommended)
7GB of available space
Apple - OS X Lion - Technical specifications
Read BEFORE upgrading to Lion > Lion upgrade questions: Apple Support Communities -
If anyone has any idea I'd really appreciate it. I just bought the iphone 5 and recieved the new nano as a birthday gift and now I'm up a creek without a paddle b/c I can't plug them into my laptop without the new itunes that runs on Mountain Lion.
Please help, I'm not very tech savvy.You don't need anything higher than OSX 10.6.8 to run iTunes 11. iTunes system requirements - http://www.apple.com/itunes/download/
You can't upgrade without more RAM.
MacBook upgrade possibilities - https://discussions.apple.com/message/19577869 - "The Early 2006 model 1,1 Core Duo can only run a maximum of 10.6 Snow Leopard. The models Late 2006 Core 2 Duos 2,1 through Early 2008 4,1 can only run a maximum of 10.7 Lion. The Late 2008 model 5,1 Aluminum Unibody through the Mid 2010 White Unibody model 7,1 can run 10.8 Mountain Lion."
Kappy 08/2012 post on upgrading to Snow Leopard, then Lion or Mountain Lion - https://discussions.apple.com/message/19401628 - including how to get Snow Leopard and Lion since Apple removed them from the online store. (Update 11/2012: SL is now available online again http://store.apple.com/us/product/MC573/mac-os-x-106-snow-leopard - USA http://store.apple.com/uk/product/MC573/mac-os-x-106-snow-leopard - UK) -
System freezes when attempting to upgrade from Snow Leopard to Lion
I hope someone can help me out there. I have downloaded the Lion upgrade install program and built an install disk on my jump drive using Lion Diskmaker 2.0.2, but when I tried to upgrade from Snow Leopard to Lion using the jump drive, the install freezes at 24% and I cannot reboot or anything. It just keeps coming back to the install screen. Any suggestions?
This could be due to a number of causes. If you have the Lion installer application, then I suggest you put it in your Downloads folder. Now do this:
Repair the Hard Drive and Permissions
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. 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 installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
When you've done the above you should now double-click on the Lion installer application in your Applications folder. When prompted click on the Install button. Note that you will not use the flash drive you made as you shouldn't need it. And, this will avoid any issues with a bad flash drive installer. -
Should i upgrade from Snow Leopard to Lion on my Macbook Air1,1 ?
Hi, I just found out the Macbook Air i bought from my friend recently isn't compatible to upgrade to Mountain Lion.
I'm very dissapointed, but thought i would upgrade to OS X Lion instead, so at least i would be able to use iCloud.
Two problems:
This is my first Mac, i know very little about them; i have no idea if an upgrade could make my Mac slower or cause other problems.
And I can't find OS X Lion in the App Store.
I verified my disk (found no problems) and have back-ups using Time Machine.
I'm running Snow Leopard 10.6.8
Model Name: MacBook Air
Model Identifier: MacBookAir1,1
Processor Name: Intel Core 2 Duo
Processor Speed: 1.8 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 2 GB
Bus Speed: 800 MHzYou can install it if you want. If you see that the system is unstable, press Command and R keys when your Mac starts, open Disk Utility, erase the disk and install OS X. See if your applications are supported > http://www.roaringapps.com
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Upgrade from snow leopard to lion 10.7.2
Hi all,
I wonder if anyone can help me at all. We currently have three MAC computers in our office, the newest one is running on version 10.6.8 and the other two are 10.5.8. I want to upgrade all of them to the new Lion 10.7.2 so we can have the new server and access all the features that goes with it. I understand that you cannot just do an upgrade from leopard to lion, you have to buy all of the upgrades. Is this correct? Also, do I need to buy all the upgrades for all of the MACS or can I just buy one version of each? Would it be a version of snow leopard, then Lion, the Lion 10.7.2 ?
Hope this makes sense, any help would be much appreciated.
Thanks again,
Andrewargo10 wrote:
We currently have three MAC computers in our office, the newest one is running on version 10.6.8 and the other two are 10.5.8. I want to upgrade all of them to the new Lion 10.7.2
First off you should consider the risks of upgrading to 10.7
1: 10.7 runs poorly or slowly on most older Intel hardware (certainly machines old encough to run 10.5 qualify)
Lion has been tested and it's a hair slower than Snow Leopard.
2: Lion machines also has to be 64 bit Intel processors, not the 32bit Intel Core Duo's. No PowerPC machines.
3: 2GB of RAM is required, but people report 4GB is better.
4: 10.7 will not run a LOT of your 10.5 and 10.6 software, and a lot haven't been upgraded/updated to work with 10.7. This also includes drivers for scanners and printers that some might be a bit older.
You can check this compatibility database
http://roaringapps.com/apps:table
Snow Leopard runs everything from 10.5 and 10.6 because of Rosetta. So all your software should work, perhaps with a minor update each.
5: OS Lion introduces some radical changes in the User Interface that can disrupt your workflow and sanity.
My 20 plus Apple vet/production manager opinion is this, upgrade the 10.5 machines to 10.6.8 and leave things alone.
When you buy new hardware, it will come with 10.7 and then you buy new software to go with it and gradually ease into it, sort of like getting a enema, insert gently.
If you go all radical and change all the machines, your going to be in for quite a bit of pain, not only on the machines, but from the users using them, believe me!
I understand that you cannot just do an upgrade from leopard to lion, you have to buy all of the upgrades. Is this correct? Also, do I need to buy all the upgrades for all of the MACS or can I just buy one version of each? Would it be a version of snow leopard, then Lion, the Lion 10.7.2 ?
You can buy this ($69) and backup, wipe and install. Need one for each machine on 10.5. and you should have one for the 10.6 machine too, but you can download Lion $29 from the 10.6.8 AppStore instead, no USB copy.
http://store.apple.com/us/product/MD256Z/A
Snow Leopard $29 install/upgrade disks are here
http://store.apple.com/us/product/MC573Z/A
Again, I suggest you just upgrade the 10.5 Intel machines to 10.6, it's less expensive, it's stable and it works faster than 10.5 or 10.7 in tests.
Save Lion for new hardware and software upgrades when they arrive. -
Upgrade from Snow Leopard to Lion (mac)
After a ugrade from Snow Leopard to Lion on my Imac, the software witch i have by mine E3000 router, works not longer anymore.
What can i do?
How can i chance something now??
greets marijkeWelcome to the Cisco Home Community.
Check out this post from troia.
http://homecommunity.cisco.com/t5/Wireless-Hotspots/New-Lion-system-on-mac/m-p/417939/message-uid/41...
The Search Function is your friend.... and Google too.
How to Secure your Network
How to Upgrade Routers Firmware
Setting-Up a Router with DSL Internet Service
Setting-Up a Router with Cable Internet Service
How to Hard Reset or 30/30/30 your Router -
I have a hdd from a late 2009 mbp. I upgraded from leopard to snow leopard to lion to mountain lion. Now I want to upgrade to a ssd. Do I need to purchase a new copy of mountain lion to go on my new ssd? If I don't, then what is the procedure to transfer mountain lion with my 4 user accounts onto the new ssd from the hdd?
I'm confused on if I can use the recovery hd on a thumb drive to install mountain lion on my ssd. Will it be pheasible with so many OS X upgrades? And then how do I get my user accounts onto the ssd from the hdd. Do I use migration assistant? Do I need to make a time machine backup first? Should I use something called Carbon Clone or something like that?
Thanks for readingIf you have a cable that connects and external HDD to the MBP, it will do. If it is something like this, an enclosure will not be needed for the swap:
An enclosure allows you to use your old HDD for storage or backup purposes. The cable will not.
Here are instructions as to how the swap can be performed using DISK UTITY. Substitute You cable for the enclosure in same:
INSTALLING A NEW HDD IN A MBP
1. Make certain that you have backed up all of your important data.
2. You will need a HDD enclosure. One with a USB connection will do. A 9 pin Firewire is better.
3. Install your new drive in the enclosure and connect it to your MBP.
4. Open DISK UTILITY>ERASE. From the left hand column drag the new drive into the 'Name' field. Make sure that the format is 'Mac OS Extended (Journaled)'. Click on the 'Erase' button.
5. Click on the 'Restore' button (on top). Drag the old drive into the 'Source' field and the new drive into the 'Destination' field. Click on the 'Restore' button on the bottom right hand corner.
Depending upon the amount of data you are transferring, this may take a couple hours or more. A Firewire will speed up the transfer. This will result in both drives having identical information on them.
6. After the data transfer has completed, you may swap the drives. Start the MBP and you have finished the installation. The initial boot may take a bit longer than you are accustomed to, but that is normal.
7. When you are satisfied that the new hard drive if functioning properly, you can erase the old drive and use it for any needs that you may have.
If there is any confusion on your part, post back.
Ciao. -
I am new to mac's and have upgrade from Snow Leopard to Lion but......
I am new to mac's and have upgrade from Snow Leopard to Lion but not all my application will work. Is it save to reinstall using original snow leopard dvd and does it wipe all my other application like apature? I am in a panic over this, any help!!
I came across this online and i want to know is it safe to do this:
Backup your User folders to an external drive. This should preserve your documents, photos, music, etc. If you store those things in locations not in the User folder, make sure to copy those over too.
Insert the Snow Leopard disc. Restart your Mac and hold down C to boot to your DVD drive.
Go to Utilities in the menu bar once the installer pops up and select “Disk Utility.”
Find the drive in the sidebar where Lion is installed, select it and navigate to the Partition tab.
Click on the drop down menu under Partition Layout and select “1 Partition.” Hit Apply.
Now navigate to the Erase tab and make sure “Mac OS Extended (Journaled)” is selected, then hit Erase to delete all data on the drive.
Quit Disk Utility to get back to the Snow Leopard installer and proceed with the install.
Restore your User folder and documents from your backup.
Run Software Update to get everything current, install your apps from your original install media and update those as well.
if any one can help me that would be great, thanks MikeBefore you do that why not do this first:
Repair the Hard Drive and Permissions
Boot from your Lion Recovery HD. 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.
To boot from the Recovery HD restart the computer. After the chime hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
If this doesn't help, then you can proceed to reinstall Snow Leopard as follows:
Downgrade 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. I suggest you make a separate backup using Carbon Copy Cloner 3.4.1.
This will erase the drive so be sure to backup your files before doing this. -
Can't upgrade to from Snow Leopard to Lion or Mountain Lion though I have paid for both.
Hi again!
I lost all sound when upgrading to Mountain Lion from Lion and was told by Apple that the cause was likely to be a bad install of ML. I am using a Prism Sound Orpheus Sound Card which worked fine with Lion.
Since then I have put in a new internal System drive and installed the latest version of Snow Leopard firstly with the DVD'S and the using software update.
When going to the apps store I cannot download ML or Lion as I believe (maybe)? that the Apps store thinks that I already have it as it was downloaded into the corrupted system of my old system drive? . I note that all the apps that I have are not listed on the new drive i.e.Pages etc How do I get around this and download Lion and Mountain Lion so that I can rebuild and test my system?You will need to remove the drive that has Lion/Mountain Lion installed, then boot from the Snow Leopard drive in order to redownload Lion or Mountain Lion. App Store detects any extant Lion/Mountain Lion system thus blocking you from re-downloading.
This time save the download so you won't have to do it again by copying it to your Downloads folder. You can then make your own installer:
Make Your Own Mountain/Lion Installer
1. After downloading Mountain/Lion you must first save the Install Mac OS X Mountain/Lion application. After Mountain/Lion downloads DO NOT click on the Install button. Go to your Applications folder and make a copy of the Mountain/Lion installer. Move the copy into your Downloads folder. Now you can click on the Install button. You must do this because the installer deletes itself automatically when it finishes installing.
2. Get a USB flash drive that is at least 8 GBs. Prep this flash drive as follows:
Open Disk Utility in your Utilities folder.
After DU loads select your flash drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
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.
Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
Set the format type to Mac OS Extended (Journaled.) Click on the Options button, check the button for Zero Data and click on OK to return to the Erase window.
Click on the Erase button. The format process can take up to an hour depending upon the flash drive size.
3. Locate the saved Mountain/Lion installer in your Downloads folder. CTRL- or RIGHT-click on the installer and select Show Package Contents from the contextual menu. Double-click on the Contents folder to open it. Double-click on the SharedSupport folder. In this folder you will see a disc image named InstallESD.dmg.
4. Plug in your freshly prepared USB flash drive. You are going to clone the content of the InstallESD.dmg disc image to the flash drive as follows:
Double-click on the InstallESD.dmg file to mount it on your Desktop.
Open Disk Utility.
Select the USB flash drive from the left side list.
Click on the Restore tab in the DU main window.
Select the USB flash drive volume from the left side list and drag it to the Destination entry field.
Drag the mounted disc icon from the Desktop into the Source entry field.
Double-check you got it right, then click on the Restore button.
When the clone is completed you have a fully bootable installer that you can use without having to re-download Mountain/Lion.
Note: The term Mountain/Lion used above means Lion or Mountain Lion.
As an alternative to the above you can try using Lion DiskMaker 2.0 that automates the process.
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