If you try to start up your Mac from a hard disk, network volume, or Time Machine backup that contains an incompatible version or build of macOS, you might experience one or more of these symptoms:
To download and install Office 2013 for a single PC, Office 2016 for a single PC and Office 2016 for a single Mac go to MyAccount. Before you begin Make sure you have. Sep 09, 2011 It may violate the MacRumors terms but morally it sounds ok to me After all the MacBook he fixed came with the version of OS X he's looking to download. Try a Google search for 'OS X Tiger DMG' or 'OS X Leopard DMG' also try including the decimal version in the search (ex: 10.5.8). I own old versions of Mac OS X, Mountain Lion in particular. The old versions are listed in the 'Purchases' list within App Store app on my Mac. The old versions are listed in the 'Purchases' list within App Store app on my Mac. OldVersion.com provides free. software downloads for old versions of programs, drivers and games. So why not downgrade to the version you love? Because newer is not always bett.
Your Mac doesn't finish starting up, or displays a prohibitory symbol at startup.
You see a message that you're using an unsupported or incorrect version of the Mac operating system.
Your Mac doesn't respond to your trackpad, mouse, or keyboard.
Apps unexpectedly quit.
Your Mac doesn't sleep or wake.
You don't hear any sound from your Mac.
The fans in your Mac are louder, because they're spinning faster.
The image on your display appears to shrink, has black bars around it, or appears tinted.
You can't use Bluetooth or Wi-Fi.
Which Mac operating systems are compatible?
The version of macOS that came with your Mac is the earliest version compatible with that Mac. To find out whether your Mac is compatible with a later version of macOS, check the system requirements:
If your Mac won't start up from a compatible version of macOS, it might require a specific build of that version. To get the correct build, reinstall macOS or upgrade to a later version of macOS.
Learn more
To restore a Time Machine backup that was created on a different Mac, use Migration Assistant.
As of September 28th, 2015, Apple has apparently removed the listings for older versions of OS X and other discontinued software from the Purchased tab of users who had previously purchased or downloaded them.
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With this software unavailable in the Mac App Store, this change means that it’s no longer possible to download the following versions of OS X from the Mac App Store:
Mac OS X Lion
OS X Mountain Lion
OS X Mavericks
Update – 9-29-2015: The listings for older versions of OS X and other discontinued software have re-appeared in the Purchased tab as of this morning, so this software is now available for download again.
Fortunately, it’s still possible to download installers for these versions of OS X, provided you have access to a Mac or virtual machine running the version of OS X that you need to download. For more details, see below the jump.
When reinstalling your OS using Recovery HD, Apple will send you the correct installer for the OS which your hardware shipped with. It does this by looking at the type of Mac you have and the serial number. Once it has those, your Mac will have the correct installer pushed to it. Once your Mac has the installer fully downloaded, it will then reboot and install OS X.
This behavior will also apply to reinstalling in a VM, but Apple will instead provide the generic OS X installer previously available in the Mac App Store instead of a hardware-specific OS X installer.
You can use this behavior to capture the InstallESD disk image that Apple uses for the OS X installer. Here’s what you need to do:
1. Boot your Mac or VM from your Recovery HD partition by holding down Command-R at startup
2. Connect an erased external disk with at least 10 GBs of free space
3. Select the Reinstall Mac OS X or Reinstall OS X option and select your external disk
4. Provide your Apple ID if prompted. This Apple ID must have previously been used to download the desired version of OS X from the Mac App Store.
5. The OS X installer files will download to the external disk.
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6. Once the installer finishes downloading and prompts you to restart, shut down instead.
7. Disconnect the external disk
8. Boot from your Mac’s regular boot drive.
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9. Reconnect the external disk
When you take a look at the external disk, you will find a directory called Mac OS X Install Data or OS X Install Data. Inside that folder is the InstallESD.dmg disk image file for that version of OS X.
I’ve verified that this method works for the following versions of OS X:
Mac OS X Lion OS X Mountain Lion OS X Mavericks
This method also works with Apple’s Internet Recovery. In the event that you don’t have a Recovery HD partition, but your Mac supports Internet Recovery, you can boot to Internet Recovery using Command-R.
If you have a Recovery HD partition, but want to boot from Internet Recovery anyway, you can boot to Internet Recovery using Command-Option-R.