Booting: Snow Leopard to Yosemite (with cordless keyboard)

[Reesche]

Hello... I have upgraded several of my internal HD's to Yosemite.

Running a MAC PRO desktop.... I have a Snow Leopard HD and a Yosemite HD.

When I try to reboot to Yosemite from Snow Leopard it doesn't show up in the Start Up Menu in System Preferances.

I just replaced my "corded" Logitech keyboard with a new "cordless" keyboard. With the "corded" Logitech keyboard all's I had to do is to hold down the ALt Command key and it would bring up all of my bootable discs to choose from.

Now that I configured my new "Cordless" Logitech keyboard it will not let me do it. It keeps booting up the Snow Leopard discs. Any ideas on this?

Thanks!

Reesche

 

[ActionableMango]

I have a cordless Logitech keyboard. If I hold down the ALT/OPTION key right after powering up the computer, it doesn't seem to register the key press. If I wait a couple of seconds but press it right before the grey screen appears, it works and I get the OS boot options.

They keyboard itself must have a short bootup/connection time involved, and anything pressed before that time doesn't count, even though I am holding it down.