I have a Mid-2010 4 core MacPro. I mainly run 10.6.8, as I have a large software investment I'm not ready to abandon. As part of my migration to the present day OS, I have multiple startup drives, 2 PCI based SSDs.
When I am running 10.6.8 and attempt to reboot into 10.10, I see this;
Obviously not 10.10. So I attempt a boot and disc utility comes up offering the usual menu to restore the OS drive. When I quit the utility, I'm offered a choice of startup drives:
Now, the startup choices appear correctly, and boot me into 10.10. When running 10.10.2, I get a fast boot back to 10.6.8.
As it stands, I need 2 boots to get into 10.10 when running 10.6.8 prior. Why does the system still see any remnant of Lion?
Edit - perhaps the right question is - "Sagan SSD contains 10.10, why does this show as 10.7 when trying to boot into it while running 10.6.8?"
In response to the comment, diskutil list shows -
and it appears to me that when I try to boot Sagan SSD it's the recovery HD that tries to boot.