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Tried clearing NVRAM? Do you hold Option during boot up? The menu in System Preferences isn't guaranteed to work from older OS versions.
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I did clear the NVRAM, and I do use the hold option trick as well. El Capitan will not show up after creating a Snow Leopard partition on my Mac Pro 3,1. It is very strange.
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is that a call for help or a warning? Or both of it?

Probably a little of both. If anyone has an answer other than resetting the NVRAM or the option key boot thing (Neither of which worked for me, my computer still wouldn't recognize the El Capitan partition post snow leopard partition setup), I am definitely willing to give other things a shot.
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I did clear the NVRAM, and I do use the hold option trick as well. El Capitan will not show up after creating a Snow Leopard partition on my Mac Pro 3,1. It is very strange.
[doublepost=1501395593][/doublepost]

Probably a little of both. If anyone has an answer other than resetting the NVRAM or the option key boot thing (Neither of which worked for me, my computer still wouldn't recognize the El Capitan partition post snow leopard partition setup), I am definitely willing to give other things a shot.
I ended up not running the PowerPC OS X games that I wanted to run and just reverting to a single El Capitan partition. If someone has a way to make it work I would like to revisit some of those older games.
 
I ended up not running the PowerPC OS X games that I wanted to run and just reverting to a single El Capitan partition. If someone has a way to make it work I would like to revisit some of those older games.

Try this in Terminal
(From Snow Leopard)

diskutil list
(Find the partition name of your El Cap disk)

sudo bless /dev/diskXsY

where X and Y correspond to the correct El Cap drive. Alternatively also try with --device and --setBoot flags. I forget exactly how the command needs to be specified ;)
 
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