Can I install OS Lion if I have forgotten my master password?

As I understand, the master password unlocks any user accounts for my laptop. I have my login password and that lets me install new programs but wasn't sure about changing the operating system?

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Can i install Mountain lion if i have Maverick installed? My audio interface do not support Maverick.

Can i install Mountain lion if i have Maverick installed?
My audio interface dont support maverick.

You can, but unless you have a backup to restore it is not at all easy, do you have a backup?

I have forgotten my master password and my admin password. What can I do to get the passwords or reset them?

I have forgotten my master password and my admin password. What can I do to get the passwords or reset them?

I have forgotten my Master password , help !

I have forgotten my Master password , what should I do , please be precise as I am barely computer literate .

Please clarify if you are talking about the Master Password associated with FileVault, or your standard everyday login password.
If you're talking about FileVault's Master Password it is possible to reset the it, but it still requires all users with FileVault-protected accounts to know their passwords. If a user has forgotten his or her login password, and you have forgotten the master password, there is no way to recover the user's data.
If you forget the master password, you can reset it, but you must know the passwords for any accounts with FileVault enabled:
1.
As an administrator user, delete the master password keychain file (/Library/Keychains/FileVaultMaster.keychain). When the master password keychain is deleted, Mac OS X assumes that no master password is set yet.
2.
In Security preferences, set a new master password.
3.
Log in to each account that has FileVault turned on, and use Accounts preferences to reset the password for each account.

I have forgotten my master password

I have forgotten my master password
how do I reset it?

Take a look at this article:
http://docs.info.apple.com/article.html?artnum=106156

I have an old emac I want to use and have forgotten the master password. Is there anyway to reset it?

How to reset master password for an OLD emac.

Thanks. I wish I had that info earlier. Unfortunately I got a set of OS emac installation disks and tried to install and start over which basically erased everything. There were 16 disks and when I got to disk twelve it "failed" and asked to try again. I went through the whole process again and same message again.
Now I am stuck with the installer which wants me to install disc 2 to continue installation. It won't let me do anything else.
I know there must be a way to erase and start over but I'm not sure where to start. Any ideas?

Have early 2007 MacBookPro, Intel core 2 duo, 2.16 GHz; six mos ago expanded memory to 3GB to upgrade software to Snow Leopard; can I install Mountain Lion on my hardware?

have early 2007 MacBookPro, Intel core 2 duo, 2.16 GHz; six mos ago expanded memory to 3GB to upgrade software to Snow Leopard; can I install Mountain Lion on my hardware?

Supported
Models
iMac (Mid 2007 or newer)
MacBook (Late 2008 Aluminum, or Early 2009 or newer)
MacBook Pro (Mid/Late 2007 or newer)
Xserve (Early 2009)
MacBook Air (Late 2008 or newer)
Mac mini (Early 2009 or newer)
Mac Pro (Early 2008 or newer)

How can I install Mountain Lion on my MacBook 10.6.8

I have not been able to install Mountain Lion. I have the last MacBook that it can be installed on.
There is no explanationother than after 3 minutes, that the there has been an error in the installtion.
I don't even know where to begin!

Try 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.

HT4463 I Can't Install Mountain Lion On My Macbook

I Can't Install Mountain Lion On My Macbook White 10.6.8 (Late 2010) . It Goes Throught The Process, And Once It's Downloaded, It Doesn't Say To Restart. I Restart It On My Own And It Still Boots Up To Snow Leopard. I Tried Downloaded It Over And Over Again Five Times, And It Does The Same Thing. Does Any1 Have Any Insight On This Issue?

As a rule the Mac App Store won;t let you buy and download Mountain Lion if your hardware doesn't support it, so the first question is did you get ML from the MAS?
If so then what procedure are you following to install the OS? You wrote that
Once It's Downloaded, It Doesn't Say To Restart.
but downloading is only part of the installation process, what exactly is happening on the system?

Can I install Mountain Lion in my Mac Pro

Can I install Mountain Lion in my Mac Pro? This is my main computer and i only wnt to move forward if I know that it is 100% compatible with OS 10.8. They tell you to look to see when it was built but there is no date that I can see. I'm pretty sure I got it in early 2008 ... Here's the Hardware overview, without the serial number:
Model Name:          Mac Pro
Model Identifier:          MacPro3,1
Processor Name:          Quad-Core Intel Xeon
Processor Speed:          3.2 GHz
Number Of Processors:          2
Total Number Of Cores:          8
L2 Cache (per processor):          12 MB
Memory:          16 GB
Bus Speed:          1.6 GHz
Boot ROM Version:          MP31.006C.B05
SMC Version (system):          1.25f4
Serial Number (system):
Hardware UUID:          449CFA37-8EAE-5A08-9027-1236BC17C747
Thanks much.

Yes, you can.
Upgrading to Mountain Lion
To upgrade to Mountain Lion you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion 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.

I Restored My Imac, But I Can't Install Moutain Lion As It Says I Haven't Purchased Lion. This Is Because I Went From Snow Leopard Straight To Mountain Lion. PLEASE HELP

So my mac is pretty much useless becuase i can't install mountain lion after a restore of my mac.
I have an imac late 2008 which i bought second hand. It only had Leopard OS X. So I bought the Snow Leopard OS X discs and installed them. I then bought Mounain Lion Straight from the app store and downloaded that.
However I recently decided to restore it for extra space. So i restored it fine and then attempted to reinstall Mountain Lion. Then a message popped up saying that 'This Apple ID has not purchased Lion' meaning that i can't now install Mountain Lion.
I then inserted the Snow Leopard disc and then it would not give me the option to install it on my hard drive and there was a little yellow caution sign on the picture of the hard drive.
I am stumped for ideas now and REALLY NEED SOME HELP
Thanks,
Fin

If you installed Leopard that is why you can't install Mt Lion. The system Must be running Snow Leopard 10.6.8 to upgrade to Lion or Mt Lion.
If you only erased the Macintosh HD partition then you left the Mt Lion Recovery HD partition in tact on that system. At startup hold down the Command+r keys to boot to the Recovery HD Partition. From there erase the Macintosh HD partition and then select Reinstall Mac OS X. It should then download Mt Lion and ask you for the Apple ID that was used to purchase Mt Lion.
The Reason Snow Leopard might not be installing is because of the Recovery HD partition. To get rid of that you must First Re-Partition the drive As One Partition. Then install Leopard then SL (Or Snow Leopard from the start) and then update it to 10.6.8. Once that is done you should be able to log on to the Mac App Store and Re-Download Mt Lion.

How to Create a Bootable Flash Drive to do a clean install of Lion. I have tried to use the InstallESD.dmg but it still will not do a clean install so that I do not have to do a reinstall from the Recovery (That just re downloads and takes over 6 hours)?

How to Create a Bootable Flash Drive to do a clean install of Lion. I have tried to use the InstallESD.dmg but it still will not do a clean install so that I do not have to do a reinstall from the Recovery (That just re downloads and takes over 6 hours)?
The system I'm have is a Mac-mini that had SL on it and no SuperDrive. I have also call Apple Support and they have really have not been to much help over 1st did my up grade to Lion and Installed the Lion Server.... it lost my SSL that I paid for and kill almost on of my server setting, plus kill all my web servers (using apache vhosts), and not to say the LDAP will even let remote users login to your laptops.
PS: There is no way that I'm going to buy a Install USB from Apple... They have over billed me over $300.00 because the Apps Store still has bugs (Glad I did not write that App/Service)
If there is anyone that can give in the information to create a USB install stick, I would be very thinkful.

Here you are bro, courtesy of "softpedia.com"....brilliant site!!!
If you ever had problems with your Mac OS X installation you know that the first thing you should do is to check the startup volume using Disk Utility.
After the check has ended and, if the errors exceed a certain level of seriousness, the Disk Utility application will require you to restart your Mac and use its Mac OS X Install disc counterpart.
Other users may have to reinstall OS X altogether, but will find, or already know, that their SuperDrive (a CD/DVD reader and write combo drive) is not functioning properly and it will not be able to read the Install disc.
Although this might happen to Mac OS X Leopard users due to faultyhardware, the vast majority of problematic SuperDrives will be encountered inside Snow Leopard running Macs.
This is due to the updated SuperDrive firmware included in either the Install disc or the software updates one has to install to reach the latest version of OS X, namely 10.6.6.
This can be fixed by flashing the SuperDrive’s stock firmware using free command line tools that one can find for free online (I will write about this process also, but at a later time because this article only focuses on allowing you to create your own alternative USB boot disc).
If you are reading this last bit of information with skepticism, than you should know that it happened to me too. Despite all my tries to make it work properly, the SuperDrive kept on munching any inserted DVDs and just popped them out in about twenty seconds.
The workaround to this issue was to create my own Leopard bootable USB memory stick. I am not suggesting a Snow Leopard bootable stick mainly because there are lots of users that have decided to buy the cheaper, Upgrade version, which I have not tested and, therefore, I’m not sure if it will work properly once written to a USB disk.
And now, here are the exact steps you should follow in order to obtain a fully bootable Leopard (or Lion) Install disc.
Step 1 (If you already have the Leopard install disc DMG file you can skip to Step 2)
Launch Disk Utility (you can find it inside /Applications/Utilities). Here select the Leopard Install disc in the list of drives on the left and click on the New Image menu entry at the top of the window. A save message will appear where you will have to select the Desktop as a destination.
Step 2
After Disk Utility has finished creating the Leopard DMG, insert your USB stick and erase all data and reformat the disk. To do this select the USB in the list of drives on the left and, after clicking on the Erase tab on the right side of the window, choose the Mac OS Extended (Journaled) format and click the Erase button beneath.
Step 3
After the USB has been reformatted, download the SuperDuper app from HERE and launch it. Once SuperDuper starts, you will only have to select the DMG in the Copy drop-down menu, your USB memory stick on the right and hit the “Copy Now” button.
One can also use Disk Utility for this task but creating a bootable USB stick failed 2 out 4 times when copying the DMG to the stick (with the exact same settings each time). Creating the bootable stick using SuperDuper proved to be the perfect way to do it because it worked each of the 4 times I tested it.
The steps above can also be used to create a bootable Mac OS X Lion USB by using the InstallESD.dmg image you can find inside the Lion installer (named “Install Mac OS X Lion.app”) downloaded from the Mac App Store in the /Applications folder.
To locate the InstallESD.dmg right click the Lion installer, select the “Show Package Contents” entry, go inside the “Contents” folder, and from there into the “SharedSupport” folder. Inside this folder you can find the InstallESD.dmg you can use to create your own bootable Mac OS X Lion USB stick. To do so, go to the third step described above and use the InstallESD.dmg as the DMG to be copied to your USB disc.
That’s it! Once the process ends you will have a fully bootable Leopard (or Lion) USB disk that you can use as an alternative to the Apple’s DVD Install disc that comes bundled with all Macs.
To use your newly created bootable disk you will have to restart the Mac, press and hold the OPTION key until the StartupManager appears. Here, select the Mac OS X Install disk using your keyboard arrows and press return to start from the selected drive.

[SOS][Urgent]Can I install OS Lion 10.7.x on late 2012 mac mini?

Hi all,
I got a late 2012 mac mini device which comes with preinstalled Mt Lion(10.8.2).
I need to run dual boot it with Lion 10.7.x. How can I install OS Lion 10.7.x on this device on different partition?
I've tried many ways but have not managed to do it(Create Lion USB bootable use my friend Lion OS dmg file).
Please help me.
TriQuang

In general, Macs cannot boot an operating system older than the one they were shipped with installed. There are some exceptions with those computers that shipped at the time of transition to a new operating system and still had the firmware that permited the immediately previous operating system. Once the firmware has been updated they can no longer boot the previous operating system.
Depending on the exact manufacture/release date of your computer it may have been possible to boot both Lion and Mountain Lion, but your use of a USB and attempt to boot showed that was not possible.
There is a technique some users say works in this case...and that is to install software such as Parallels 8 on an external drive partition, then install Lion on that partition and run it in a virtual machine environment. This gets very complicated but can be done.
Another alternative you might want to consider is looking at the Apple on-line store, lower left side of that window, and see what refurbished equipement is available that runs Lion. Those computers have been completely gone over by Apple, new batteries for the portable models, new caes, any faults repaired, and come with new computer one-year warranties. They are indistinguishable from a new computer. And if there is one that meets your needs you would have your current machine running ML and another running Lion.

I have 10.5.8 can I down load Lion?, I have 10.5.8 can I down load Lion?

I have 10.5.8 can I down load Lion?, I have 10.5.8 can I down load Lion?

10.6.8 introduces the Mac Application Store, the only way to download Lion on the web. However, you can purchase Lion on a USB dongle for $69 US from Apple.
Although you can't update Leopard from the dongle, you could clone the Leopard volume and erase and install Lion on the original partition and then use the Leopard compatible Migration Assistant. http://support.apple.com/kb/DL1434?viewlocale=en_US&locale=en_US
All in all, cheaper to just buy Snow Leopard, and then buy Lion from the Mac Application Store.

I erased my HD. Now I can't instal mountain lion from my bootable flash drive, and keep getting "installation error. Try again."

I bought mountain lion, made a bootable flash drive.
I booted from it and it went to upgrading right away!
So I stopped it and went to my former recovery partition I erased my HD because I wanted a clean start.
Now I can't instal mountain lion from the bootable flash drive, and keep getting "installation error. Try again."
and there is no 4 choices window.
I don't know what to do.

How did you create the USB install thumb drive? If it was with Disk Utility I have run into this problem and have since used THIS program to make the USB install drive.
As to your problem you only have one option and that is to Reinstall the Original OS X version that came on your computer or if you still have the Lion Recovery Partition use that to reinstall Lion. Or if you system came with Lion and you have No Lion Recovery HD Partition you can boot the system from over the internet and Reinstall Lion.
At startup hold down the Command+Option+r keys until you saa a spinning Globe in the center of the screen. Once that loads Repartition the drive as One partition and then reinstall Lion.

Can I install OS Lion if I have forgotten my master password?

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