HT3775 i installed mountain lion. Which quicktime do I need?

I recently installed Mountain Lion. Now i have trouble with certain quicktime movies not playing.

There is a Mountain Lion forum:
https://discussions.apple.com/community/mac_os/os_x_mountain_lion

Similar Messages

Brand new Mac, had to erase drive through disk utility as time machine back up failed. Now disk utility only has the option to install Mountain Lion which my Mac won't allow. Anyone any ideas as my Mac won't load anything up but disc utility!

Brand new Mac, had to erase drive through disk utility as time machine back up failed on initial setup, USB cable popped out Now can only access disk utility as won't load to log in screen. The only has the option in disc utility is to re-install Mountain Lion which my Mac won't allow or loading another time machine back up but after an hour of it processing, that didn't resolve the issue either! The time machine back up is the latest back up of my Mac Book Pro which was using OS X Maverix. I'm guessing I'm going to have to take my Mac to the store but that would be a hassle so does anyone have any ideas?

Follow this guide using another Mac.
Insert your newly created Mavericks USB into you Mac, press the power button and then hold down 'option,' until it gives you an option to boot from the USB. You will then be able to erase the internal disk with Disk Utility and reinstall Mavericks straight after.
After that you should be able to use Migration Assistant to restore your applications and user data.

Cannot install Mountain Lion on empty drive

I'm helping my father try to install the OS onto a newly installed internal drive on his Mac Pro. He's trying to install Mountain Lion, which is the same OS X generation as his usual boot drive (which is remaining in the system—the new drive is getting an OS as a backup boot drive).
The problem is that the Mountain Lion installer, downloaded from the App Store, refuses to install on the new drive. The drive, which is formatted but otherwise empty, does not appear as an available drive to install on.
My father believes that this is related to the note in the System Requirements saying that the Mac being installed on must already have Snow Leopard or Lion installed on it. I'm not so sure, but it's a valid question: can Mountain Lion be installed only as an upgrade, requiring an existing OS install on the actual drive being installed to?
My interpretation of the listed requirement is that you have to boot from Snow Leopard or later to do the install, because the installer has to contact the App Store, but the requirement is worded ambiguously enough that it could mean that the drive itself must have Snow Leopard or later on it. It doesn't make sense to me, though, for this installer to be useable only as an upgrade; there are numerous situations under which a person might need to install an OS on an empty drive.
So there's two questions here: can Mountain Lion be installed on an empty drive, and are there other likely reasons for the installer to not offer the drive in question as an available destination?

Mark McKean wrote:
...So there's two questions here: can Mountain Lion be installed on an empty drive, and are there other likely reasons for the installer to not offer the drive in question as an available destination?
Yes, it can be installed on an empty drive but the drive must be properly partitioned and formatted first. The HD must have a "GUID Partition Table" which you establish when you first partition the drive (use the Options... button), and it must then be formatted Mac OS Extended (Journaled). Boot from his current drive and run the ML installer from there with the new drive as the target. Note that if you haven't actually downloaded the ML installer yet, when you do, it automatically starts running but you get the choice to continue and choose the drive.
Snow Leopard or Lion are mentioned as prerequisites because the days of install DVD's are over; the installer must be downloaded and at least Snow Leopard is necessary to get to the App Store to do that.

Cannot install Mountain Lion on my hard disc, as I keep getting the message" 'This disk is used for Time Machine backups'. Which it isn't - I don't use Time Machine

Cannot install Mountain Lion on my hard disc, as I keep getting the message" 'This disk is used for Time Machine backups'. Which it isn't - I don't use Time Machine

Check to see if you have a folder named "Backups.backupdb" at the root level of your hard disk. That can cause this error message.

Final Cut Pro X after installing Mountain Lion I have lost some of the "additional content" which was available by clicking on "Download Additional Content" in the roll down from "Final cut Pro". Now this feature takes you to store update?

Final Cut Pro X after installing Mountain Lion I have lost some of the "additional content" which was available by clicking on "Download Additional Content" in the roll down from "Final cut Pro". Now this feature takes you to Apple store update? which produces nothing! How can I download these free sound and music files, what has happened? Please help as there is nothing on the apple site to cover this??

Final Cut Pro X after installing Mountain Lion I have lost some of the "additional content" which was available by clicking on "Download Additional Content" in the roll down from "Final cut Pro". Now this feature takes you to Apple store update? which produces nothing! How can I download these free sound and music files, what has happened? Please help as there is nothing on the apple site to cover this??

I have installed Mountain Lion 10.8.2 but still cannot get email from my work exchange account. I'd appreciate any help. Thank you.

I have installed Mountain Lion 10.8.2 but still cannot get email from my work exchange account. I'd appreciate any help. Thank you.

You can go to the Apple online store and purcahse a copy of Mountain Lion. This will give you a redemption code, which you can use to download Mountain Lion from the App Store. Unfortuantely, I'm not aware of any other way to legally purchase it. I have never seen Apple release Muontain Lion on DVD.
In terms of Apple Service, they just need the serial number of the machine to check the purcahse date. It is usually correct, to within a few weeks. A quick Google search should give you the correct number to dial.
I hope this helps.

I'm not crying. Is there a way to install Mountain Lion on a bootable disk on latest iMac cuz mine shipped without an OS?

I could cry right now. After decades of being an Apple fan, something is happening for the worse and issues with every Apple product I own 2 iphones, 2 iMacs, 15" Macbook Pro, and iPad Mini (no issues here, just slow connecting to App Store and can never seem to download updates) has left me disenchanted. I do have a question about Mountain Lion but just airing out grievances.
Ok, to the point. I have the new 27" iMac that was just released. Was delivered and opened the box, turned it on, and there was a flashing folder icon. No OS, wonderful. I live in Brooklyn and not trying to lug a 27" computer onto the train nor should I have to pay for a cab to resolve this. Anyway, I tried to go into Recovery but it started doing an Internet Recovery with a download time of 9 hours. Um, no thanks. So I downloaded the latest version of Mountain Lion from the App store on my old iMac and made a boot disk onto an external via Apples instructions. Plugged it into new iMac lemon, go into recovery mode, see the bootable drive, click on it to reinstall and it gives me a crossed out circle icon and shuts down.
What am I doing wrong? I have pretty decent broadband and did start the internet recovery process now until I find a better solution online. After 5 hours, Internet recovery finished and clicked on Reinstall Mountain Lion to which it's asking me to download the OS again and with a 13 hour download time!!!! What's going on here? What was the purpose of internet recovery taking 5 hours only to download it again at another 13 hours???
Question is, is there something I should be doing differently? Is there a way to install Mountain Lion from a bootable disk? This is mind blowingly the dumbest thing I've encountered with Apple. Got a problem with your OS? No problem, just download a 4.4GB file every incident.
Thank you.

You can't grab a installer from another Mac and expect it to run. The newer Macs have newer hardware which requires special drivers. If the version that boots the iMac is a special build, it won't work any other way than Internet Recovery.
If it was me, I'd take it right back. You have no idea if the OS is just corrupted, the hard drive is dead, or what. I wouldn't take my chances with it.

I think I finished installing Mountain Lion, and am at the "log in" page with my name and the Lion icon, but I cannot do any of the functions on screen. That is, I cannot log in, sleep, restart, or shut down. I am running it on an Early 2009 Macbook Pro

I think I finished installing Mountain Lion, and am at the "log in" page with the Mountain Lion icon, but I cannot do any of the functions on screen. That is, I cannot log in, sleep, restart, or shut down. I am running it on an Early 2009 Macbook Pro, which is said to have the capabilities of running Mountain Lion.

BrettGoudy wrote:
...Is there any way I can install a partition that runs snow leopard on my early 2011 MB pro with what I have (new SSD, New RAM, Current version Lion running, no external drive, lack of original snow leopard disks [I lost them ] and the general 10.6.3 snow leopard boot disks)...
As the last post suggests, call Apple and order a replacement original disc for about $17. They will ask you the model and serial numbers.
Your retail version of Snow Leopard OS 10.6.3 will not work on that Mac as it requires a minimum of OS X 10.6.7 to boot and operate.
Another alternative is to again borrow another Mac to install your retail Snow Leopard into an external HD or partition, upgrade it to 10.6.8 and then clone it back to a partition on your MBP.

I installed Mountain Lion so that I could sync my notes with my iPhone that already syncs notes with a specific email address I use for school, but during the install it automatically set up Notes to sync w the wrong email addy. How can I fix it?

I installed Mountain Lion so that I could sync my notes with my iPhone that already syncs notes with a specific email address I use for school, but during the install it automatically set up Notes to sync w the wrong email addy. It looked in Mail, which had 5 email accounts set up in it, and for some reason picked the only one that I no longer use because it is for a school that I no longer attend. How can I fix it so that it syncs with the correct email account for notes and calendar? There don't seem to be any settings available other than to check if you want to use the basic features. It also said during the set up that it was setting up 'find my mac' but if I look on the iCloud website there is nothing showing there for finding my mac.
At this point I feel like I wasted my money paying for this supposed upgrade. I got nothing for it but frustration. It even automatically set my security settings to allow only downloads from the Mac store so the first time I went to download something I had to stop what I was doing and go correct settings first. I feel like there should be a security setting to block downloads from the Mac store so I don't accidentally end up clicking the wrong thing and being charged.

iCloud isn't syncing them on your phone. You simply added the email account to your phone and enabled calendar and notes syncing with the email provider, and the calendar and notes appear in the calendar and notes apps on your phone. You can do this with Gmail, Yahoo and other IMAP account. iCloud email is just another IMAP account, but syncs notes with Apple's iCloud server just as Gmail syncs notes and calendars with Google's server.
iCloud didnt' set up a non-iCloud account on your Mac. When you check Mail in System Preferences>iCloud, it only creates an iCloud email account. You can also add other email accounts to your Mac by going to System Preferences>Mail,Contacts,Calendars and clicking on the "+" sign on the bottom of the left sidebar. If you added these other email accounts to your Mac before you upgraded to Mountain Lion, these were simply maintained on your Mac after you upgraded.

How How can i install Mountain Lion with faulty firewire ports??

Basically the firewire ports are fried on my MBP 3.1 (2007). My mac used to take hang on blue screen and take 10 mins to boot but I solved this problem by installing an ssd and deleting the following kext file...
/System/Library/Extensions/IOFireWireFamily.kext
My MBP now boots in under 20 seconds so if anybody is having the same issue then there is the resolotion..
Anyway these are the steps I have taken but failed to properly install ML.
Dowloaded Mountain Lion at least 3 times from the App store to make sure the download wasn't corrupted.
I even tried making a Lion Bootdisk so I can install Mountain Lion on a USB drive (Install ESD.dmg).
I have even tried installing Lion first thinking I would take it one version at a time but gets stuck on boot screen too.
I even changed my hard drive to a new blank SSD drive to see any difference.
Each time I install Mountain Lion or Lion, everything is good until the installer has to restart the laptop.
Laptop gets stuck at the grey boot screen with the Apple logo and the loading circle. Nothing ever happens after.
I always had to use/boot to the Snow Leopard CD so I can restart the laptop back to the Snow Leopard OS and then update to 10.6.8.
I am guessing it is the ML dmg reinstalling the above file ( /System/Library/Extensions/IOFireWireFamily.kext ) which is leading to the same issue because of the faulty firewire ports.
Is there anyway I can resolve this because its doing my head in and Snow Leopard is old and doesnt support newer software that I would like to use.
Any help would be kindly appreciated. Thanks

Kurt Lang wrote:
Just some thoughts.
I presume you already partitioned the new SSD drive as GUID?
Is there anything on the new drive at all yet, or anything that isn't already backed up? If not, you could try erasing the drive and then installing OS X from the bootable flash drive installer you made.
Ive tried that and yes it is GUID. Im going to get grey hairs soon and Im not even 30 lol .... yet
I am not going to buy a new logic board as its just not logical (sorry for the pun) I got the mac for free and I want to spend as little money as possible. Im running out of ideas though

How I installed Mountain Lion on Un-repairable Hard Disk.

My Recommendations for Avoiding Trouble, Avoiding Risk, and Saving Time.
1) Make a boot clone first!!!
      http://www.bombich.com/
http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html
2) Fix and repair your hard disk with Disk Utility and fsck_hfs before installing Mountain Lion!
    (Otherwise the installer will write-lock the disk preventing repair.)
Mountain Lion Aborted Installation—Claimed Hard Disk Failed, Couldn't be Repaired, and Should be Replaced
I have a 2011 MacBook Pro. Installation of Mountain Lion aborted claiming the hard disk could not be repaired by Disk Utility, should be backed up immediately, and replaced. It didn't make sense that the drive was booting up the computer for installation, but needed replacing. I removed the drive, put it in an external enclosure, and backed up the drive using a working Mac Mini, and Carbon Copy Cloner.
Hard Disk Was Write-Locked—Not Failing
Booting in Single User mode (hold command and S keys down while bootup is proceeding). I then typed in the fsck command given after Single User bootup. It informed me the drive was write-locked and read only. Now things were starting to make sense. Disk Utility couldn't repair the drive because it was write-locked! Maybe it could have been unlocked by the "chflags nouchg /Volumes/volume" or "chflags noschg /Volumes/volume" commands (http://hints.macworld.com/article.php?story=20031017061722471), but I didn't try it. Unlocking the drive is really worht a try because it could save hours of coppying through a slow USB interface.
I formatted my laptop drive after copying it to another large external drive. Then I used Carbon Copy Cloner to clone Snow Leopard from my Mac Mini to my freshly formatted original laptop drive. I unsellected the "Users" folder so I would only get the operating system—saving lots of hours copying data I don't need. Then I put the drive back in my laptop, and it booted with Snow Leopard. Checked the volume with Disk Utility and was informed the drive is fine. I removed the drive and connected it externally to my Mac Mini and ran fsck_hsf a few times in the terminal, which showed problems were found and fixed.
sudo fsck_hfs -fy /dev/rdisk1s2
Password:
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** Checking Journaled HFS Plus volume.
** Checking extents overflow file.
** Checking catalog file.
** Checking multi-linked files.
** Checking catalog hierarchy.
** Checking extended attributes file.
** Checking volume bitmap.
   Volume bitmap needs minor repair for under-allocation
** Checking volume information.
   Invalid volume file count
   (It should be 550614 instead of 550591)
   Invalid volume free block count
   (It should be 175459733 instead of 175460263)
** The volume MacBookPro HD was found corrupt and needs to be repaired.
3) sudo fsck_hfs /dev/rdisk1s2
Password:
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** Checking Journaled HFS Plus volume.
fsck_hfs: Volume is journaled. No checking performed.
fsck_hfs: Use the -f option to force checking.
[karl_ihrig] 4) sudo fsck_hfs -f /dev/rdisk1s2
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** Checking Journaled HFS Plus volume.
** Checking extents overflow file.
** Checking catalog file.
** Checking multi-linked files.
** Checking catalog hierarchy.
** Checking extended attributes file.
** Checking volume bitmap.
** Checking volume information.
** The volume MacBookPro HD appears to be OK.
5) sudo fsck_hfs -fy /dev/rdisk1s2
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** Checking Journaled HFS Plus volume.
** Checking extents overflow file.
** Checking catalog file.
** Checking multi-linked files.
** Checking catalog hierarchy.
** Checking extended attributes file.
** Checking volume bitmap.
** Checking volume information.
** The volume MacBookPro HD appears to be OK.
6) sudo fsck_hfs -fy /dev/disk1s2
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** Checking Journaled HFS Plus volume.
** Checking extents overflow file.
** Checking catalog file.
** Checking multi-linked files.
** Checking catalog hierarchy.
** Checking extended attributes file.
** Checking volume bitmap.
** Checking volume information.
** The volume MacBookPro HD appears to be OK.
I put the drive back in the laptop and repeated the fsck commands after a Single User boot. (Omited the sudo commands and used /dev/disk0s2.)
Downloaded and Successfully Installed Mountain Lion on "Unreparable" Drive
I downloaded the Mountan Lion installation application to my laptop, ran it, and had a smooth install.
More Trouble Migraiting My Applications and Directory
I expect to use up more time changing my computer name, migrating applications and rsyncing my User Directory. I will post how I achieve this.
I Hope People Avoid Trouble and Problems are Solved
I hope everyone will avoid trouble by making boot clone of their whole disk before attempting an install of ML and repairing their disk with Disk Utility and fsck before ML installer prevents it with a write-lock. Please see the first section.
I hope this solves other peoples problems with 'unreparable' disks. I believe this proves disks are repairable when ML says otherwise.
Good luck everyone!

troca, you certainly helped dtigerbme! Isn't that encouraging?
I recommend you copy your drive as soon as possible. I really don't think the drive is bad, but you may have to format it and copy back to it. Hopefully not. Clone or backup the drive before trying this recipe. Any time you have errors on a drive, back it up. A failing drive has lmited life. However, I don't think these drives are really failing, but that is my opinion and I break a lot of things.
Let's try this recepie for you:
Start in Single User Mode. Power on while holding the Command + S keys.
At the prompt, type "fsck_hfs -fy" or "fsck -fy" and hit return.
Do it again.
Enter the command "reboot".
Just googled "volume count disk utility" and got the same recipe to fix it.
http://counterjumper.com/post/19265700171/how-to-fix-invalid-volume-free-block-c ount-error-in
So my recipe is to try to fix the drive without taking it out of the computer, which requires you can boot it up.
troca it looks like Apple has said that error is benign and can be ignored in 2010.
http://support.apple.com/kb/TS2028?viewlocale=en_US&locale=en_U
I do believe fsck will fix it though.
Some other results from the same search:
http://forums.macrumors.com/showthread.php?t=1071850
https://discussions.apple.com/thread/3635034?start=0&tstart=0

I lost my address book when I installed Mountain Lion and have not been able to recover it. WHen I type in a name in an email the address shows up, so I know it is in there. How can I restore my address book?

I don't know how to do this. I typed the question in the bar above, but apparently need to type it again here. I lost my entire address book when I installed Mountain Lion and have been unable to recover it. I know the information is in there as when I type in someone's name in an email the address always shows up right away. How can I find the information for my contacts and restore my address book? Do I need to go to the Apple Store that is 2 hours away and have an expert help me or can I find out how to do it online for free myself?

The auto-complete in Mail addresses comes from two sources: (1) The "Previous Recipients" list, which can be viewed via Mail > Window > Previous Recipients. (2) Your Address Book (now called "Contacts").
If you did in fact lose your Address Book - are you sure you don't have "Contacts" in your Applications Folder? - It sounds like you are getting addresses from source (1). If you did in fact lose your Address Book (now called "Contacts" !!), you will have to restore it from a backup.
charlie

Since I've installed Mountain Lion, I am having lock up issues with multiple programs. MS Outlook has crashed and I've lost all my folders. HELP?

Since I've installed Mountain Lion, I am having lock up issues with multiple programs. MS Outlook has crashed and I've lost all my folders. HELP?

okay I've finally been able to get tor and all the other programs to work according to my plan the only thing that's still making problems is that iptables doesn't work as I want it to, when I start chromium without proxy settings privoxy doesn't seem to forward the information to polipo.. do I need to add another rule to iptables.rules in order for the program to know it has to reroute the information again or how can I get this to work? and is there any way to run rtorrent with proxy support?
anyway, problem 2 and 3 are still to be solved.
and does anybody know where i can get a good dansguardian blacklist that was not designed for 6 year old children and for which I don't need to subscribe? I'm still getting these partypoker popups -.-
//e: with iptables it's the same thing as described in the first post. https works, http doesnt. I get the output "Invalid header received from client." on http sites. still no idea why though.. (and the https-version of torcheck.xenubite says i'm tor unprotected while starting the browser with iptables)
Last edited by deF291 (2011-04-23 16:16:31)

Can i install mountain lion on my macbook 2006, 2ghz intel core 2 duo, 2gb ram?

hi , is it possible to install mountain lion on my macbook from 2006, 2ghz intel core 2 duo and 2 gb ram
in the moment i use 10.6.8 and i want to update for installing iwork09, wich requiered 10.7 or more. i need the new iwork, cause my old pages and numbers dont work together with the iwork on my ipad4.
ok, thank you, nice greetings

10.7 Lion is still available from Apple. You will have to call Apple Customer Care 1-800-692-7753 or 1-800-676-2775. to purchase it. Then within 3 days you will get an email with a code which you can use to download Lion from the App Store. The price is $19.99.
You must have at least a Late 2006 Core 2 Duo model 2,1 MacBook.
Lion will require at least 2gb of RAM but really needs 4gb to run smoothly.
As for third party programs see this list for compatibility with 10.7 http://roaringapps.com/apps:table
Also Lion doesn't run any Power PC 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. When System 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 in 2006 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 the 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. With 10.7 Lion Apple dropped all support for Power PC applications.

Installing Mountain Lion from Snow Leopard, Install failed and HD write-locked

I recently downloaded the mountain lion installer from the App Store and I ran the installer. Stupid person as I am, I did not have any backups for my file and I naively assumed that an apple OS installer would be without flaws. Boy, was I wrong. I need every bytes of my data (or close to every bytes) but the installer failed.
Mid installation, the installer stopped and said that the installation failed and that I need to repair my disk. So I restarted the computer and I ran disk utilities (my start up disk was the OS installer and the installer allows me to run several programs, including terminal, disk utilities, and by the way, when I held option while starting up to see which start up disks I have, I only had the OS installer as the start up disk. Also, the installer allows me to run a program called "Startup Disk" when I click on the apple logo on the top left corner, but it doesn't allow me to startup my computer using Macintosh HD) and noticed that when I highlighted Macintosh HD, my "Repair Disk" button was grayed out. So first things first, I ran the "Verify Disk" button but after a minute or so, Disk Utilities said that verification failed and that Macintosh HD needs to be repaired. But the "repair disk" button is grayed out! So I went to the Mountain Lion installer again and ran it. Of course, it failed again so I restarted the computer.
So I tried to first back up all files in Macintosh HD to an external hard drive using Disk Utilities, and I used features such as "New Image" and "Restore" but they both ended up in "Input/Output error". I tried many methods with Disk Utilities but they resulted in errors.
After some research, I noticed that some people's computers worked after they reset their PRAM. So that's what I did. I held command+option+P+R when computer started up and I reset the PRAM. When the start up disk (which is the OS installer, not the normal operating system) loaded, I was greeted with choose languages option and then I was back in the Mountain Lion installer state. I again ran the installer again, hoping something would be different, but then it was different. But not in a good way. When I was told to choose where I would like to install Mountain Lion, I noticed that Macintosh HD was grayed out. Last time, I was at least able to run the installer but this time, Macintosh HD was grayed out. The installer said that my Macintosh HD was locked. After some research, I learned that apparently, the Mountain Lion installer write-locks Macintosh HD mid installation.
So now I am stuck and I am thinking of two things (plus some questions)
1. I am wondering if there is a way to unlock Macintosh HD. But even if I can unlock Macintosh HD, there is no guarantee that the installer will successfully install Mountain Lion, am I right?
a. so how can I un-write-lock Macintosh HD?
2. More realistically, I am thinking of borrowing someone else's macintosh computer and use it as the backup center. I have a firewire cable and a terrabyte external hard drive. So what I'm thinking is that I'll hook my computer in target mode to my friend's computer and I will also plug in my external hard drive to my friend's computer and then I can download and run Carbon Copy Cloner from my friend's computer to copy all data from my Macintosh HD to my external hard drive. And then I will erase my Macintosh HD, freshly install Mountain Lion onto it and then copy all data back from my external hard drive. But I am not sure about few things.
a. it looks like my Macintosh HD is write-locked. Can I still use Carbon Copy Cloner to copy all data from Macintosh HD (in target mode) to my external hard drive?
b. will my computer allow me to erase (or format) Macintosh HD?
c. will my erased/formatted Macintosh HD able to install + be installed Mountain Lion OS?
If you are here, then you have read my long long problem. Thank you very much and I would really really really appreciate your answers and opinions. Thanks

I'm not sure where you read that about the disk being "write-locked." That doesn't make much sense, given that the major task an installer like this must achieve is writing a whole bunch of files to the hard drive. I think your source was mistaken.
As to what happened, it sounds like your hard drive was badly corrupt to start with, or possibly was on the edge of failing and is now in the process of dying entirely. If you don't have backups of your data, that does not bode well for you, unfortunately. If you can manage to use target mode to copy your data, do that.
Once you're sure you've got all your data, you need to start up from your Snow Leopard install disk and repair the hard drive. (Since it sounds like the Mountain Lion installer didn't work, I wouldn't trust the recovery partition that Mountain Lion installs.) Or, even better, just erase the hard drive entirely and reinstall Snow Leopard. Then, once you're back up and running, with all your data back on the system and with Snow Leopard updated to the most recent version, try installing Mountain Lion again. If any of that fails again, the problem is likely to be a dying hard drive, and you'll need to replace it.

HT3775 i installed mountain lion. Which quicktime do I need?

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