HI gary, I would have to confirm it but I believe with the changes in firmware on your host machine, you wont run snow leopard from an external drive,
The other thing you could try is boot up your host machine with the external drive connected, then go into system preferences and find near the bottom of the list an option called Start UP Disk, Go in to this and with el capitan you may have to unlock the start up disk options, and then select what you have called your snow leopeard external drive and then tell it to start or should I say restart on to that drive and see what happens. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Gary Sent: Thursday, 16 June 2016 4:08 AM To: Macvisionaries <[email protected]>; [email protected] Subject: need help with external bootable drive Hi everyone, I need a guru. Using my 2008 iMac with Snow Leopard installed, I installed Snow Leopard on a 1TB external drive. I created a GUID partitioned and formatted it as OS X Extended Journaled. Using the Option key at start up I can boot up using the external drive. However, I can’t seem to boot up the external drive on my 2013 iMac nor my 2014 Macbook Pro, both running El Capitan. When I start my 2013 iMac or MB Pro, while holding down the option button, my snow leopard device appears on the list of bootable devices. When I select it, it proceeds to, the Apple logo screen, but it doesn’t say loading nor can I see a cursor nor the spinning progress indicator, and it just sits there. This is true for both systems. Of course, I had sighted assistance with the visual things. Does anyone know what’s happening with my external drive or how I can fix it? I need Snow Leopard for an old app and want to upgrade my 2008 iMac to Mavericks, which i’m already in the middle of. Gary -- The following information is important for all members of the Mac Visionaries list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your Mac Visionaries list moderator is Mark Taylor and your owner is Cara Quinn - you can reach Cara at [email protected] The archives for this list can be searched at: http://www.mail-archive.com/[email protected]/ --- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/macvisionaries. For more options, visit https://groups.google.com/d/optout. -- The following information is important for all members of the Mac Visionaries list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your Mac Visionaries list moderator is Mark Taylor and your owner is Cara Quinn - you can reach Cara at [email protected] The archives for this list can be searched at: http://www.mail-archive.com/[email protected]/ --- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/macvisionaries. For more options, visit https://groups.google.com/d/optout.
