07-30-2012 06:29 PM
I realize this is a common question, but the link provided - Sleep - how to turn off sleep settings in MacOSX 10.5, Leopard gives me an internal sever error. I have a 1.5 TB expansion drive I've been using with my macbook for 3 years now without issue but since upgrading to Snow Leopard a week ago it's shutting itself off. I have unchecked the energy saver preferences for Mac. I have tried all the solutions I found on the internet including Seagate's troubleshooting. The software that came with the expansion drive is PC only. I've only been able to find management software for GoFlex and it doesn't recognize my drive.
my expansion drive worked great until I upgraded my OS to Snow Leopard.
Is there Mac drive management software for the expansion drive? Suggestions?
08-01-2012 10:01 AM
I'm sorry to let you know this, but the Expansion drive is PC-ony and not supported in a Mac environment. Because of this we don't have any troubleshooting steps available for your particular situation.
The only options here would be to continue using the drive without disabling the sleep timer, or to get a drive that's supported on MacOS.
08-01-2012 12:32 PM
That's an incredibly unhelpful response, thanks for nothing. As it turns out I found the solution via macforums myself, which I will include here to help others who might have the same issue with any Seagate external drives on their Mac.
Why is your external HD powering off and unmounting? Becasue Apple changed the way usb power supply works.
Since Snow Leopard, OSX has changed power management for USB ports - you need to use a powered USB hub as an intermediary device between any usb external HD (of any make from any manufacturer) and a Mac. FWIW the only reason I can see that Seagate markets certain external HDs as "PC only" is for strictly marketing and support personnel reasons - there is nothing about an external HD that makes it PC only.
08-02-2012 06:47 AM
The reason the drive is recommended for PC-only is due to the type of bridge card used in it. It doesn't work well with Mac systems and for this reason we don't support the drive in Mac environments.
For further questions on this topic I recommend you contact our technical support staff. Contact information is available here: