How to Downgrade Yosemite OS X 10.10 to Mavericks 10.9

Suppose, you have replaced OS X 10.9 with 10.10, you can downgrade Yosemite to Mavericks without losing your important data…

Apple unveiled OS X 10.10 with the name of Yosemite OS X 10.10 which has been released under beta 1 program. The users who have developer account or who have participated beta program, can install Yosemite OS X 10.10.

Downgrade Yosemite OS X 10.10 and restore mavericks 10.9

Yosemite OS X 10.10 beta 1 has many improvements including a lot of bugs. If you have installed Yosemite OS X 10.10 on your Macbook or Macbook Pro and facing battery life issue, then it might possible that its because of OS X 10.10 Yosemite. You can downgrade Yosemite OS X 10.10 and restore Mavericks 10.9 anytime without losing your important data.

Well, if you have made a mistake on installing beta program by replacing Mavericks 10.9, then its time to downgrade OS X 10.10 Yosemite and restore Mavericks OS X 10.9.

  • Download Mavericks OS X 10.9 and store on your hard disk
  • Backup your important data with the help of Time Machine

If you face any issue while downgrading Yosemite to Mavericks, just comment here…

33 Comments

  1. “This copy of install OSX application is too old to be opened on this version of OSX.”
    I downloaded it via ThePirateBay. As I legitimately own Two paid versions of this free piece of software I assume I have done nothing illegal. But I still get this issue.

    • It’s a pretty safe bet that anything on Pirate Bay is illegal, and is likely in independent of purchase history. It is certainly a convenient way to find the files, mind you, but what you’ll get is almost certainly illegal–either because you or the person posting it is violating the terms of use (which I assume you read in detail, right? Yeah, me neither.)

      My suggestion would be to return to the Apple Developer site, where you got your beta, download the Mavericks distribution (probably the same as the one that gave you the above error) and build some boot media (DVD or thumb drive, etc.). Booting from that will allow you to wipe the machine clean, and will not give you the “this things is way too old, man!” error message.

      Hope that helps.

  2. I’m trying to downgrade my iMac from Yosemite to Mavericks, but when I try to download Mavericks from the Dev Centre nothing happens. Also, when I try to download Mavericks from the App Store a dialogue pops up saying that I am unable to download because I am using 10.10. Where can I download Mavericks from?

  3. son a a beach this comment is purely offensive every one and i think this is the most stupid comment of the decade and does not help anyone.

  4. I have upgrade Mavericks to Yosemite, but now facing a lot of errors, and wanna downgrade to Mavericks from Yosemite, please help

  5. sir i m upgrade mavericks to yosemite, but now i am facing that my computer is disable for 60 minute i m face this last days during install i m enter wrong passcode in yosemite so pl help me i will wait ……………………………..
    my gourav

  6. I agree, it would be kinder to say, sorry Mr. X but there’s only one way to revert back to Maverick’s a clean install. You sir are severely lacking in social graces and basic understanding of human nature… Where were you born or were you raised by a pack of wolves. For Shame!!!

  7. i installed yosmeite by replacing Mavericks. So now i face a battery drain issue. So i need to downgrade to mavericks. I cant download maveriks from itunes now, because they show the error as “new osx10.10 is in ur system”. What i do.? i tried many 3rd party sites to download mavericks .BUt no use. all .dmg files are corrpted.How i can downlaod it rom itunes

  8. My fix was rather complicated and lengthy, but I’ll post it here because I can’t find any other fixes. I would say that this method should be use as a near-last-resort solution.

    !!!Warning!!!
    Be sure that your Mac is connected to the internet via an ethernet cable before doing anything in the following steps.

    Step One: Backup your Mac, power-off.
    Step Two: Reboot and hold ⌘–R
    Step Three: Open Disk Utility
    Step Four: Format ‘Macintosh HD’ (Or your system partition).
    Step Five: Power-off, reboot.
    Step Six: Due to the OS files being deleted in the previous steps, the computer will automatically download and install the OS that it was shipped with. You can upgrade to the OS of your choosing from there.

    • Its not a cost thing. It would be the same if the original user had been payed to use the software. The reason it is theft, is because it is copywrited material. The owner of the material can declare how it can and can not be used. In this case, Apple has stipulated that you may not redistribute the material in the manner being discussed.

  9. I just bought a macbook pro second hand, it has the osx yosemite beta. Ive tried to restore it to its factory settings.
    But once I erased the macintosh hd extended journal which i thought went correctly
    I tried to then reinstall the os x I go to the signing stage, and then it says its unavailable try again later…..can anyone help?

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