HT1338 Mountain Lion double install?

Hi,
I have recently got a MacBook Pro Retina and have installed Mountain Lion twice.
Is it possible to do so and if so does it use up space on my hard drive?
Cheers

Welcome to the Apple Support Communities
Probably it took space on the hard disk, but it shouldn't be a lot. You can ignore it because your Mac will work correctly

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HT1338 Mountain Lion not installing

From the apple app store, purchased Mountain Lion. The mountain lion app icon shows download, but when I click down load nothing happens.

The issue is resolved.
Went to the app store and took the option to show my purchases. There it showed that that the down load was paused. Why it was paused is beyound me. Just restarted it and the download completed.
Before starting the installation I then made a back up copy of the install.dmg app and copied it to my other Macs so I didn't need to wait for the down load on the other computers.

How do you erase mountain lion to install snow leopard?

Hi, My mother now has a new to her late 09 mini that originally shipped with snow leopard. When she bought it it came with mountain lion preinstalled from a private seller. We were thinking that to be on the safe side that it might be better to erase and install what's on it just to be sure it is secure. I tried to erase and install snow leopard from a disk but it says that the installer is not compatible with this version of osx(mountain lion). Question: How do I erase mountain lion and install snow leopard?
I've read here that there is possibly a built in recovery disk that I can use to erase and reinstall mountain lion. Q: Is there a built in recovery disk available in my situation? and if so should I use it or be even safer by installing snow leopard instead?
Thank you,

I think I found the answer (from sl install disk use disk utility to erase then install sl). Thanks for looking.

How do i reinstall mountain Lion after installing maverick. Maverick is not compatible with FileMaker 13 server. Maverick is now objecting to reinstalling Mountain Lion. Where do I go from here? Help?

How do i reinstall mountain Lion after installing maverick. Maverick is not compatible with FileMaker 13 server. Maverick is now objecting to reinstalling Mountain Lion. Where do I go from here? Help?

If you can download the ML installer you can make a bootable install media by using:
http://liondiskmaker.com/
If your Mini came with ML you can also boot to Internet Recovery
OS X: About OS X Recovery
and it will install ML. Make sure you boot to Internet Recovery and not the Recovery Partition. If to the partition you will only get Mavericks.

I have a MacBook Pro bought in dec 2009. Currently has mountain lion osx installed. Worked like a dream until today. Randomly froze, so I restarted it. To find I got a grey screen. It wouldn't start. Also note my DVD drive doesn't work, but mountain lion

I have a MacBook Pro bought in dec 2009. Currently has mountain lion osx installed. Worked like a dream until today. Randomly froze, so I restarted it. To find I got a grey screen. It wouldn't start. Also note my DVD drive doesn't work, but mountain lion was installed via App Store anyway.
So here's what I done so far:
tried resetting PRAM - No success
Done disk utility. Disk verified with no errors. I even re formatted disk. - no success starting.
Tried re installing mountain lion via download . It froze halfway installing -no success.
Tried backing up a time machine backup from my USB hard drive. It froze at 1% - no success
Tried booting from safe mode - no success
Tried the command line boot - no success.
Please someone help!

Sounds like the hard dre has left the building, Died, in the Sh*tter, Gone to the hard drive resting place in the sky.
Buy a new drive connect it to the system with a SATA to USB adapter and see if you can install Mt Lion on that drive connected externally. If you can then the drive inside your system has failed.
Oh Wait!!!! You have the 2009 model. They are known for bad drive to logic board cables. So it may not be the drive itself but the cable going from the drive to the logic board. Do the same as above then if the system runs OK with the new drive connected externally install it in the system and see if it boots. If it does you are good to go. If it doesn't then it is more then likely the cable that hs failed.
I would suggest you also SAVE a copy of that download of Mt Lion and create a USB install drive from it using Lion Disk Maker, once you get your system up and running.

How do I know if Mountain Lion has installed properly?

How do I know if Mountain Lion has installed properly?

I can only guess that the install process was interrupted, maybe after the files were extracted but before the install, maybe on the reboot?
If it was dome ot would say version 10.8. And you would have the reminder and notes apps as well, also an easy thing to check.

HT1338 Mountain Lion download problems

Tried to get Mountain Lion download/install on my computer. Got message "An error has occured" so can't download. Computer is up to date with plenty of space.

Went to Genius Bar. Solved my problem but I'm not sure how helpful. He ran some diagnostics (hardware diagnostic progeam; Mac Disk Utility for Hard Drive Verication and repair. Don't think he found much wrong. Then, he went for download on their connection, which worked just fine. He explained it was because of the extremely fast download connection. So, I guess you have to get your Mac to somewhere with a super-fast connection (Apple store, but also our local libraries have a very fast connection) for download.
That's all for this problem, as far as I can tell. Over and out.

Can Mountain Lion be installed under own ID over previous owners?

I bought a barely used Mac Book Pro Retina in November 2013. 512 GB 16 GB Ram model samsung screen made in March 2013. I called Apple and they helped me get everything over into my name except the Mountain Lion OS. The previous owners Admin. account was also deleted after I added mine.They said if I wanted to upgrade to Maverick that would be in my name. The problem is if I wanted to revert back would it accept the previous owner's or would my licensed version have to be on first? I do not plan yet to update but need to know first.
I went to Apple.com last week and purchased my own license for OS Mountain Lion. I followed the emailed instructions and downloaded into my Applications. I then backed-up my computer to an external Toshiba Canvio Slim II external drive for MAC. Easy drive to back-up.I also printed the emails and sent over to another computer for safe keeping.
I left my licensed version of Mountain Lion OS in Applications until I want to install it.
My question is do I install over the previous owner's Mountain Lion and will it then it will show up in my name only? Or do I have to reset the entire computer and erase Mountain Lion and install my Licensed Mountain Lion? The only thing I see of the previous owners is the iPhoto update won't update but that may be because mavericks now on it to do so. I deleted iMovie and Garageband but couldn't purchase in my name as I didn't have Maverick OS.
I have had no issues with downloading from iTunes or Mac App Store or anything else in my name and or updating since I had Apple help me.
I appreciate all the great feedback on this forum.
Thank you.

No, it can't. You must repartition the drive in order to install your owned version.
Install Mavericks, Lion/Mountain Lion Using Internet Recovery
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 Internet Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.
Partition and Format the hard drive:
1. Select Disk Utility from the main menu and click on the Continue button.
2. After DU loads select your newly installed hard 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.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed. Quit DU and return to the main menu.
Reinstall Lion/Mountain Lion. Mavericks: Select Reinstall Lion/Mountain Lion, Mavericks and click on the Install button. Be sure to select the correct drive to use if you have more than one.
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.
This should restore the version of OS X originally pre-installed on the computer.

When should I expect to buy Mac with Mountain Lion pre-installed?

I'll like to purchase MacBook Air 2012 but prefer Mountain Lion pre-installed. It seems I need to keep waiting even the Mountain Lion is available today.

It will probably take a few days to a couple of weeks, depending on stock, for Apple Stores to have systems with Mountain Lion installed; longer for many independent dealers. If you're ordering from the online Apple Store, it probably will be much sooner, but call them and ask.
You may find it better to have Lion preinstalled. That way you can upgrade to Mountain Lion when you're confident it's stable and that all your apps are compatible.
Regards.

Can i go from 10.6.8 straight to OS X Mountain lion without installing OS X Lion?

I have Snow lion 10.6.8...do i need to get lion first then mountain lion...or can i just get mountain lion and install?

Assuming your system profile is correct you can purchase Lion here:
http://store.apple.com/us/product/D6106Z/A/os-x-lion
You will be purchasing a download code, to be "redeemed" in the App Store.
Read the system requirements and back up your system first, as a precaution against the unexpected.

I want new computer with mountain lion already installed.

I want to buy new MacBook air with Mountain Lion already installed. Currently not available at store and can't be guaranteed on line. How long should I wait?

Welcome to the Support Communities. It's unlikely that anyone here knows how long it will be until Macs with Mountain Lion installed appear in the stores near you. If you prefer not to wait, consider buying a MacBook Air now and upgrade to Mountain Lion for free — see under "Qualifying purchases on or after July 26, 2012" here:
http://www.apple.com/osx/uptodate/

Does mountain lion support install from a RAID drive?

does mountain lion support install from a RAID drive?

Apple does not support the 3rd party drives. To enable it (without installing another software package), you can visit the website:
http://digitaldj.net/2011/07/21/trim-enabler-for-lion/
I ran the series of commands on my Mac Pro and it did enable TRIM.
the webpage even has a backup/back-out procedure.
Without TRIM, my computer was running extremely slowly. After enabling TRIM, my computer ran substancially faster.

Can mountain lion be installed on mac book pro late 2011 4gb memory?

can mountain lion be installed on mac book pro late 2011 4gb of memory and how?

This page tells you the requirements to install Mountain Lion:
http://www.apple.com/support/osx/getstarted/
Check it. It also describes how to install Mountain Lion.

HT1338 mountain lion isn't installing - it's saying 'waiting'; I have everything required for the install.

I've bought Mountain Lion - hit download. In the launchpad it has the icon; it's been saying 'waiting'. I have everything required for the download. Does it just take this long? It's been over an hour.

Quit and relaunch the App Store app. It apaprently thinks that something else is still downloading, and it won't download more than one thing at once.

I have Mountain Lion OS Install CD downloaded onto my external hard drive, how do I use this to upgrade from Leopard

Current computer that I just bought used is operating on Leopard 10.5.8
I have Mountain Lion OS X CD installation files downloaded on my external hard drive from another Mac that I have owned.
How do I use my external HD to download and Install Mountain OS X wizard.
Is the only way to do this to buy a copy of snow leopard and then once upgrading to that, plug in my external HD and then access the Mtn install file as I would if I had the installation CD?
When I try to access the install file from my external HD, i get to the installation window and then when I am to select a hard drive to install it on I receuve a red exclamation mark error that says it can not be written to the HD. Why is this? Because I'm not on snow leopard but rather leopard?

As you have the installer on a DVD, you can do a trick that consists in formatting the hard drive, and then, install Mountain Lion.
First, make a backup of your files with Time Machine > http://support.apple.com/kb/HT1427 I recommend Time Machine because it will be easier to restore your files later.
Then, insert the DVD with Mountain Lion and hold the C key while your Mac is starting, so you will see a window with different options. Open Disk Utility, choose Macintosh HD in the sidebar, go to Erase tab and erase the drive.
After erasing the drive, you can install Mountain Lion. Close Disk Utility and install it. During the initial setup, it will ask you to restore your files, so plug the external drive with the backup and follow its steps. Note that PowerPC apps aren't compatible

HT1338 Mountain Lion double install?

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