It's also in a hidden location, so it's not easy to get to, so we need to start by making it visible… To get around this, we drag the file to the desktop & work on the copy that is made there. This 'simple task' is unfortunately complicated by a couple of factors.įirstly, because you don't 'own' the file the system will try to stop you from writing to it. Once you are sure that each will boot when requested, then you can set your fstab file to not mount the other drive in each case.Ĭhanging the fstab file to hide a partition is just a 'simple task' of adding one line of text to a text file one on each boot partition. To boot into the other on just a single occasion, hold Alt ⌥ at the startup chimes & choose it from the drive icons that will appear That will set the default OS that it will boot into. To determine which it will boot into at any given time, you can set that in System Prefs > Startup Disk. That's your time to feed it the Time Machine backup of your MacBook Pro.īy the time it's finished, your Mavericks partition will be a usable 'copy' of your Macbook. On first boot after installation it will ask if you wish to Migrate from another machine. Then you need to get Mavericks onto the new partition. You can set each to not mount when the other OS is 'in charge' by tweaking a file known as fstab in each OS separately but we'll come to that later.įirst thing to ensure is that your two partitions have different, recognisable names - it will save a lot of trouble later. ![]() By default, the Mac will always mount all non-hidden partitions - so both partitions will automatically mount to both OSes, whichever you boot from, even when each contains a different OS.
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