Should I upgrade OSX 10.8.5 to Yosemite?

Discussion in 'OS X Yosemite (10.10)' started by jetlagged, Dec 2, 2014.

  1. jetlagged, Dec 2, 2014
    Last edited: Dec 2, 2014

    jetlagged macrumors 6502

    Sep 6, 2012
    I never got around to upgrading to Mavericks. I have a MBA 2012 1.8/ 8/ 256.

    any thoughts before I go ahead and do it?
  2. simonsi macrumors 601


    Jan 3, 2014
    Take a Time Machine backup first.

    Copy the installer file to a USB and/or make a bootable USB installer with DiskmakerX.

    If you hit problems be prepared to carry out a fresh install over the upgrade.

    If still problems be prepared to revert or start over.

    Be prepared for a faultless install and no problems afterwards - my 4 were like that :)
  3. grahamperrin macrumors 601


    Jun 8, 2007
    Before you upgrade, use System Information to take a note of the boot ROM version. Just in case you later decide to install something less than Yosemite; a firmware downgrade may be required.

    Similarly, set aside the installers for Mountain Lion and Mavericks. Having the installers readily available – in addition to your backups of Mountain Lion – is a convenience that you might later appreciate.

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