Computer partitioned Y|SL

kathryne_B

macrumors regular
Original poster
Mar 9, 2005
116
11
CA
Hello everyone:

I may have posted this here before (I can't remember). I have my computer partitioned. On one side Yosemite and the other side Snow Leopard. For some unknown reason Apple has taken the startup disk out of Snow Leopard. So, there is no way to switch back and forth between systems. In order to switch from SL to Yosemite a command has to be typed in the terminal, the option key held down till the computer restarts, to be directed to Yosemite. When I first installed Yosemite, when I'd turn on the computer it'd start up on the Yosemite side, but if I had to go back to Snow Leopard, it would not take me back to Yosemite, I would have to do the terminal thing. I asked if anyone here knew how to go to Yosemite and be able to stay there permanently. So, a few months ago, someone here (I think and if I remember correctly) told me about locking the padlock on Yosemite -- I locked it and it stayed there permanently. Because I had to go back to Snow Leopard to get some info, now, I've tried unlocking and locking the padlock, but it isn't working. When I start up the computer it always starts up in Snow Leopard. Maybe I'm not locking the right thing? I'd deeply appreciate it if someone could tell me again, what it is that I am to lock to avoid starting up on Snow Leopard. Thank you and I hope I haven't confused you. -Kd
 

Eithanius

macrumors 65816
Nov 19, 2005
1,419
285
Padlock Yosemite partition... o_O You lost me there...

What happened to System Preferences > Startup Disk...?
 

redheeler

macrumors 604
Oct 17, 2014
7,396
6,965
Hello everyone:

I may have posted this here before (I can't remember). I have my computer partitioned. On one side Yosemite and the other side Snow Leopard. For some unknown reason Apple has taken the startup disk out of Snow Leopard. So, there is no way to switch back and forth between systems. In order to switch from SL to Yosemite a command has to be typed in the terminal, the option key held down till the computer restarts, to be directed to Yosemite. When I first installed Yosemite, when I'd turn on the computer it'd start up on the Yosemite side, but if I had to go back to Snow Leopard, it would not take me back to Yosemite, I would have to do the terminal thing. I asked if anyone here knew how to go to Yosemite and be able to stay there permanently. So, a few months ago, someone here (I think and if I remember correctly) told me about locking the padlock on Yosemite -- I locked it and it stayed there permanently. Because I had to go back to Snow Leopard to get some info, now, I've tried unlocking and locking the padlock, but it isn't working. When I start up the computer it always starts up in Snow Leopard. Maybe I'm not locking the right thing? I'd deeply appreciate it if someone could tell me again, what it is that I am to lock to avoid starting up on Snow Leopard. Thank you and I hope I haven't confused you. -Kd
I dual-boot Snow Leopard and Yosemite on several Macs and neither shows the Yosemite partition in the Snow Leopard System Preferences > Startup Disk. I believe it has something to do with how Yosemite handles partitions which Snow Leopard doesn't recognize.

To set Yosemite as the default partition for your Mac to boot from, Option-boot and hold down the Control key when you press enter to boot into the Yosemite partition. Or go into the Yosemite System Preferences > Startup Disk and restart from its partition.
 

kathryne_B

macrumors regular
Original poster
Mar 9, 2005
116
11
CA
Padlock Yosemite partition... o_O You lost me there...

What happened to System Preferences > Startup Disk...?
I thought I had explained this? When I go the startup disk on the Snow Leopard side, to switch over to Yosemite, the Yosemite start up disk (icon) doesn't show up. So I have to enter the cmd manually on the terminal and boot up holding down the option key down, till is shows the hard disks. Is that what you are asking?
 

kathryne_B

macrumors regular
Original poster
Mar 9, 2005
116
11
CA
Option-boot and hold down the Control key when you press enter to boot into the Yosemite partition. Or go into the Yosemite System Preferences > Startup Disk and restart from its partition.
Thank you for your response. Yes, I did startup from Yosemite's Preferences System, this morning. Hopefully it'll not slip back to Snow Leopard side again, when I reboot tomorrow. I have kept your instructions. Thanx again!
 
Last edited:

DeltaMac

macrumors G3
Jul 30, 2003
9,526
2,299
Delaware
Yes - a known issue when having both Yosemite and Snow Leopard partitions. redheeler has it correct, I see it too.
You have to do a work-around, and not much else you can do...
But you shouldn't need the extra step "enter the cmd manually on the terminal..."
Just restart holding the Option key. Choose the Yosemite boot when you see it come up, and press enter.
Another choice is to have the Startup Disk set for whichever system that you use. Don't change it before you reboot, just use the Option boot picker screen - you choose to do that every other time, anyway :D
If you leave the startup disk with your normal choice, it boots to your more used system by default!
 

kathryne_B

macrumors regular
Original poster
Mar 9, 2005
116
11
CA
Don't change it before you reboot, just use the Option boot picker screen - you choose to do that every other time, anyway :D
If you leave the startup disk with your normal choice, it boots to your more used system by def
Thank you, DeltaMac. Your suggestion will be less of a headache. I'll give what you've suggested a try. Thanx again!
 

kathryne_B

macrumors regular
Original poster
Mar 9, 2005
116
11
CA
Yes - a known issue when having both Yosemite and Snow Leopard partitions. redheeler has it correct, I see it too.
You have to do a work-around, and not much else you can do...
But you shouldn't need the extra step "enter the cmd manually on the terminal..."
Just restart holding the Option key. Choose the Yosemite boot when you see it come up, and press enter.
Another choice is to have the Startup Disk set for whichever system that you use. Don't change it before you reboot, just use the Option boot picker screen - you choose to do that every other time, anyway :D
If you leave the startup disk with your normal choice, it boots to your more used system by default!
DeltaMac, your suggestion worked just fine this morning! Wish I could give you a star! Thanx sooo much!!!