I cannot install ODX Yosemite over OSX Mavericks as my Mac Book Pro (early 2011) advises that the disc "Mackintosh HD" is used for Time Machine back ups. This is not the case however as I use a separate external HD for this purpose, help please ?!  T

I cannot install ODX Yosemite over OSX Mavericks as my Mac Book Pro (early 2011) advises that the disc "Mackintosh HD" is used for Time Machine back ups. This is not the case however as I use a separate external HD for this purpose, help please ?!
Thanks

Check this link out...
OS X: Cannot install on a volume used by Time Machine for backups
I was apart of this thread and it helped the OP...
Re: System installer thinks my main drive is my time Machine backup and won't install.
KOT

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