You'll need to download the Mavericks installer from the app store, make usb boot drive from it, boot up from that, repartition the drive and reinstall.
Agreed, in fact I think you need to back up your data before any system upgrade, such as installing Yosemite. I should have posted that a backup should be taken before any work on the drive.I don't know of any other way, either. But before you do that, you'll probably want to copy data and anything else you want to save to another drive.
Macs haven't shipped with CDs for years now, its possible the OP has a newish Mac.install from cds you received with your mac
So you are telling me that whoever installed Yosemite and hasn't make a backup apple DOESN T LET him to go back to Mavericks.
Apple has also updated the recovery system with yosemite... there is no way to install mavericks from recovery... yosemite erases the preinstalled mavericks on recovery.
So you are telling me that whoever installed Yosemite and hasn't make a backup apple DOESN T LET him to go back to Mavericks.
Apple has also updated the recovery system with yosemite... there is no way to install mavericks from recovery... yosemite erases the preinstalled mavericks on recovery.
So you are telling me that whoever installed Yosemite and hasn't make a backup apple DOESN T LET him to go back to Mavericks.
Apple has also updated the recovery system with yosemite... there is no way to install mavericks from recovery... yosemite erases the preinstalled mavericks on recovery.
The installation instructions on the beta seed page tell you to make a Time Machine backup, and also instruct how to restore Mavericks from that backup.
If you don't have a Time Machine backup, you have two fairly easy options.
1: install the version of OS X that your computer was shipped with by using Internet Recovery (hold Cmd+Opt+R while booting)
2: download the Mavericks installer from Mac App Store, and make a USB installer with DiscMakerX
Either option will also create a working Mavericks recovery partition. But you'll probably have to erase the whole disk with Disk Utility before you can go through with any of the options, as Mavericks seems to have issues with the logical volume Yosemite creates. So make sure all your files are backed up.
If you are having trouble downloading Mavericks from MAS, you can try to:
-check for unfinished downloads (Menu Bar -> Store -> Check for Unfinished Downloads...)
-sign out of MAS (Menu Bar -> Store -> Sign out), and log back in again
-create a new local user account and try downloading
-create a new Apple Account and try downloading
In Yosemite > startup disk > pick Mavericks > reboot holding down option key. All partitions should be visible now.I have a slightly different problem. I installed Yosemite on another partition/ disk drive in my Mac Pro. I want to reboot into Mavericks on another drive now. If I select that drive in 'startup disk' (which for some reason now has a question mark over the icon in system preferences), the computer reboots and starts up the Yosemite installer again.
Any ideas how to fix this?
In Yosemite > startup disk > pick Mavericks > reboot holding down option key. All partitions should be visible now.
Thanks
Unfortunately, it doesn't work. Booting with the alt key held down results in a grey screen (no apple logo visible). No partitions, no text, nothing. The pointer arrow is there and the trackpad can move it.
What this means is I end up having to go through the Yosemite installer and reelect the Yosemite partition from there. Still no way to boot up my Mavericks partition
I said option key not alt key.
I said option key not alt key.
Gah this is turning into a bit of a nightmare.
I deleted the 'install Yosemite' file from the partition Mavericks is installed on. Tried booting into that partition. I get some kind of kernel panic (image attached) then black screen, then a splash screen 'your computer restarted because of a problem....' Then back to the kernel panic.
Trying to safe boot causes a hang with the progress bar stuck
Trying to boot with alt/ option causes the problem stated above (grey screen)
So now I can't boot into mavericks or Yosemite
Anyone got any bright ideas how to fix this?