How to delete Mavericks and re-install Mountain Lion

Kinda a mac newbe. I installed the Mavericks update and lost the ability to mirrow my mac via AirPlay to either of my Apple TV devices (which they are the black apple tv boxes - not sure if they are II or III). I did reboot everything with no improvement (iMac, Apple TV (2), and Airport Extreme).
Would love any guidnance on how to fix it or go back to Moutain Lion.
Thanks,
Russ

riverjiggin wrote:
... go back to Moutain Lion.
DOWNGRADE from MAVERICKS
https://discussions.apple.com/docs/DOC-6161

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Suddenly my event library in iMovie 11 is empty. I have tried deleting the plist, importing clips from multiple locations (to see if they show up in the library), re-installing iMovie, and re-installing Mountain Lion. Help??

Suddenly my event library in iMovie 11 is empty. I have tried deleting the plist, importing clips from multiple locations (to see if they show up in the library), re-installing iMovie, and re-installing Mountain Lion.
I was working on a project, when all of a sudden the event library went blank. There are no devices showing in the left column, only "last import" and "aperture videos". There are no video clips in the editing window. I have "Show: All Clips" selected. I've tried "group events by disk".
When I have a Project open, it plays just fine. There are no yellow triangles saying "source clip is missing". Yet, again...nothing is in the event library large editing window. So, it seems the data is still there, but invisible. This is true with all the projects, and all the external devices I've experimented by plugging in to see if their video clips show up in the event library.
I have tried to import new movies, and iMovie responds as normal...looking like it's importing, then "generating thumbnails", then it makes the "ding" signalling that the import is complete...but nothing shows in the event library. I've tried importing movies from the harddrive, from quicktime, and from an external drive.
I have searched the forums, and found many users with a similar, but not the same, problem. For them, it seems the "go to users-library-preferences and delete iMovie plist" has solved their problem. This didn't work for me.
I uninstalled/reinstalled iMovie, I even have re-installed Mountain Lion (from a last-ditch effort suggestion from Apple technician).
HERE'S AN INTERESTING DETAIL: After almost 5 hours on the phone with Apple, I decided to cut my losses and take my project to another Mac I have. I'm working on a project, for work, that is critical that it's completed by tonight (whoops), and all my video is on an external drive. So, I plug in the external drive to Mac #2, open iMovie, and everything is looking fine. I continue importing some files I was converting, through Wondershare, and suddenly (whether or not this has to do with the importing, I'm not sure), the SAME THING happened to Mac #2!!!! I can't believe this.
Does anyone have any suggestions? Have you ever heard of this happening? Could it have to do with the files I'm importing???
I apologize if my language is confusing. Obviously, I'm not an Apple genius-person! I hope I've provided all the information you need.
Mac #1 is a 27" desktop, mid-2012, software up-to-date. Mac #2 is a 24" desktop, about 4 years old, OSX 10.7.5

I'm adding more information:
in Finder, my iMovie folders are all visible and accessible. When I click on a clip from iMovie Events folder, Quicktime opens and plays the clip. ALL my video is not missing - it just isn't showing up in the Event Library!
This happened all of a sudden, while I was working on iMovie project (on both computers).
All my Projects are intact, and play when I open them.

Ok here goes nothing i have a late 2009 iMac 27 11.1 intel bought it refurbished and they installed mountain lion 10.8.4 on delivery w/o disks i think ran lion orig. idk & its been all problems 10.8.5 M.L so tried Maverick 10.9 now worse please help me

ok here goes nothing i have a late 2009 iMac 27 11.1 intel bought it refurbished and they installed mountain lion 10.8.4 on delivery w/o disks i think ran lion orig. idk & its been all problems 10.8.5 M.L so tried Maverick 10.9 now worse please help me.....i still have backups of software for mountain lion 10.8 however i need to throw everything on a usb toshiba 1TB external storage for backup, plus from what ive read being i needed to try to go back and update the efi and frimware for my original model but when i found the right one it wont accept it.....and now i just tried to reinstall my mountain lion probably shoud have left in the cloud til i got backed up ...which i now needed to move my previous backed up stuff off the drive to reformat it properly as i read it being toshiba needs to be guid hard drive mac im relatively new to the whole mac thing and im just as ****** off as i was with PC ....lol i just wanna record music and have a steady workflow i do have a new 4s iphone and cloud storage but i believe my computers hacked or got malware or just ****** from incompatiable software ......and keychains not working for admin either PLEASE tell ,me what to do thx .....i will be so grateful im good with recording software and stuff bad with computers programing lol HELP me

Hardware Overview:
Model Name:          iMac
Model Identifier:          iMac11,1
Processor Name:          Intel Core i7
Processor Speed:          2.8 GHz
Number of Processors:          1
Total Number of Cores:          4
L2 Cache (per Core):          256 KB
L3 Cache:          8 MB
Memory:          16 GB
Processor Interconnect Speed:          4.8 GT/s
Boot ROM Version:          IM111.0034.B02
SMC Version (system):          1.54f36
Message was edited by: lnwko

How do I partition my MacBook Pro so I can keep Snow Leopard and also install Mountain Lion?

How do I partition my MacBook Pro so I can keep Snow Leopard and also install Mountain Lion?
I want to install the latest OS, but I already know that I will lose a lot of my software unless I can partition the hard drive and have two "bootable" drives.
How do I retain everything I have, partition the drive, then reloa the software I own according to which OS it will work under?

msmedia wrote:
I do not currently own OS X ML.
I am currently running OS X (10.6.8 Snow Leopard) on my MacBook Pro. It has a 2.8GHz Intel Core 2 Duo Processor. I want to upgrade to Mountain Lion, but many of my software titles will not operate with ML and I cannot afford to replace some of them (Adobe Creative Suite, for e.g.)
After I back-up my HD and then partition the HD, how do I use the back-up to reinstall what I want to the SL partition, and then place the rest on the ML partition.
I have not done what you want to do, so can only offer some general thoughts in support. Take value from the following where you can. No guarantees.
If it was me, I would use a disk clone utility (e.g. Carbon Copy Cloner) to image the existing Snow Leopard disk to an external drive. Then verify that the external drive would boot and run Snow Leopard normally.
I would then purchase and download the Mountain Lion upgrade installer, but not run it. Use Lion Diskmaker to make a bootable USB stick, and perform a clean install of Mountain Lion, replacing the Snow Leopard on your MBP. This way, you make absolutely certain that no third-party drivers or other SL cruft remains to make Mountain Lion unstable. Update to latest ML point release. Fix permissions. Let TimeMachine make a full backup of your ML installation to a different external drive. Then turn of Time Machine.
In Disk Utility, use the + sign at the bottom of the ML partition to add another GUID, HFS+ Journaled partition for Snow Leopard. Resize to taste. Name it differently from your ML partition. Exhale.
Now ideally, you would like to reverse the external clone and put it back into the new SL partition. Then fix permissions. And demonstrate that you can boot into individually stable OS X installations. This would save you alot of work. Resist copying your home directory into ML just yet.
If you cannot successfully achieve the preceding paragraph, you will be faced with a full SL and application reinstall.
The ~/Library contents for SL and ML are sufficiently different that you do not want to mix them. You may want to salvage Safari bookmarks.plist. And, ML created folders in the home directory may have different permissions or ACL settings than in SL. So, my rule of thumb would be to copy folders that you created in SL, and only the contents of matching named OS created folders such as Music, Pictures, Downloads, etc.
For each operating system, you probably want the Time Machine settings to exclude the opposite OS X partition. If you use the same host name in Sharing prefs, then you will mix SL and ML backups on the same Time Machine back up drive. If you use different host names, they will be distinct folders in the Time Machine backups.backupdb and allow discrete restores per host. You may also want to gag Spotlight from indexing the opposite OS X partition.

How can I wipe my hard drive and clean install Mountain Lion?

Hi I have a 21.5 inch mid 2011 iMac running Mountain Lion, I want to wipe my hard drive and clean install Mountain Lion. I dont want all my stuff back, just photos and music, the rest I'll reinstall my self. I also dont have a exteranl harddrive. only two USB's one 2 GB and the other 8 GB. How do I do this? And I dont want to pay for mountain lion again. Thanks!

I made my partition and am currently reinstalling mountain lion to put on my flash drive. I'm using Lion disk maker 2 thats compatible with mountain lion. I'm doing it right, correct?

How long does it take to install mountain lion

how long does it take to install mountain lion

It depends on a number of factors - the speed of your computer and hard drive mostly. My experience has been that a standard upgrade will take 30-45 minutes. If you are erasing the hard drive and installing, it takes about 20-30 minutes, not counting migrating your data and applications.
This doesn't count downloading which can take as litting as 40 minutes (a very fast broadband connection during off hours) to as much as several hours.

HT204032 I purchased my Macbook Pro in November 2011 and just installed mountain lion but do not have the power nap option.. anyone know why?

I purchased my Macbook Pro in November 2011 and just installed mountain lion but do not have the power nap option.. anyone know why?

It is for the MacBook with built in flash storage.
http://www.apple.com/osx/whats-new/features.html#powernap
4. Power Nap requires a Mac notebook with built-in flash storage. May require a firmware update.

Can I un-install Yosemite from my iMac and re-install Mountain Lion?

Can I un-install Yosemite from my iMac and re-install Mountain Lion?

Sorry to barge in like this but is it because you found it to have it's own way of doing stuff without your control? As i was thinking of doing the same thing because i found Mountain Lion much more user friendly.I know you came for an answer just was searching and came accross your question.
Hope you find the answer. good luck.

Somebody knows how to get rid of OS Maverick and revert to mountain Lion

somebody knows how to get rid of OS Maverick and revert to mountain Lion

Check out this user tip > How to revert OS X back from Mavericks: Apple Support Communities

How to delete VmWare (Win XP) after Mountain Lion upgrade?

Hi,
I used to have Windows XP emulated via VmWare. Now as I upgraged from Snow Leopard to Mountain Lion this is no longer supported. But how do I get my data which I stored in Windows and how can I delete the whole virtual machine afterwards to get the free harddisc space back, because I cannot even open the vmware application.
Please help me, it's kinda urgent

Allesnuridee wrote:
So I got a shiny new full version of Fusion 5, how can I convert my existing virtual mashine made with Fusion 3? I'm only able to convert them from Prallels/Virtual Box or make a new one?
With Fusion 5 installed, you should be able to simply open the XP virtual machine from within Fusion. If Fusion doesn't automatically detect the XP VM is present, go to File/Open and look for the XP VM in /Users/your user name/Documents/Virtual Machines/ or just go to your Documents folder and find the Virtual Machine folder. Indeed, if you look there first and find the XP VM, you should be able to just double click on it and have it open in Fusion 5 (that's assuming you've removed Fusion 3 first). Also, just to be on the safe side, once you find the VM in your documents folder, make a backup of it first. Finally, do you remember if you shut XP down the last time you used it or is it just suspended?

How to format macbook pro to install mountain lion

I have a macbook pro i5 and mac osx 10.7.5, and i would like to update to mountain lion. I would like to know if I need to format my mac and how?

Yes. If you can, make a bootable clone as well.
(90295)

HT4818 how long does it take to install mountain lion?

My computer (the App Store page) says that it is downloading Mountain Lion, but I don't see any progress and it has literally been "downloading" for hours. I've been billed for Mountain Lion, but it is not on my computer. I'm sure that my computer was ready to accept Mountain Lion. Now what?

It all depends on your download speed. Patience is a virtue.
Leave your computer running. Verify throught the app store the download is in progress or restart the download.

My mac book pro is of early 2011 and i installed mountain lion and was searching for the airplay function but it is not there.

My macbook pro is an early 2011 version and i updated it with mountain os.... but the air play function is not there how do i activate it??????please help..

AirPlay Mirroring menu on the menu bar is not shown..i have the early 2011 mac book pro..which is the minimum requirement..any suggestion??

My Macbook Pro 2012 won't turn on. Tried CMD R and re-install Mountain Lion. Now I get always get a message: Macintosh HDis damaged. But when I repair HD, It says it's OK. What Can I do? I've been with this all day. Replace HD?

Tried as wel PRAM. CMD +S. Tried D key and it blocks when testing... I' going mad!!!

Guess your harddrive is busted. You'll have to get it repaired.

How do I install Mountain Lion AND format the hard drive?

I want to do a completely clean install of Mountain Lion.
I had Snow Leopard installed, upgraded to Mountain Lion (by buying it from the App Store) but how do I tell it to format the drive and then install Mountain Lion?

pforkes wrote:
I want to do a completely clean install of Mountain Lion.
I had Snow Leopard installed, upgraded to Mountain Lion (by buying it from the App Store) but how do I tell it to format the drive and then install Mountain Lion?
Snow Leopard would have needed to be installed on a properly formatted drive, so I don't understand why you would need to format it again to that same format.
Cheers
Pete

How to delete Mavericks and re-install Mountain Lion

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