Same problem here. The good news is that I have a bootable backup copy (Carbon Copy Cloner) on my Western Digital USB attached drive. The bad news is that macOOS Sierra does not see my USB attached devices. GrrrrAnybodys hard drive via usb working? How do I revert back to El capitan? Can't use my time machine back
Yep. Worked as advertised.Apple will not allow a late 2009 Mac Pro to even download it, let alone run the installer.
Surely someone with such a Mac Pro has installed this already. Any ideas?
I just fixed mine by reverted back to my back up... Restart computer hold command and R select backup time machine make sure HD is connected and just hit nextSame problem here. The good news is that I have a bootable backup copy (Carbon Copy Cloner) on my Western Digital USB attached drive. The bad news is that macOOS Sierra does not see my USB attached devices. Grrrr
Installed macOS Sierra on an external USB drive connected to my iMac to test. First thing I noticed when rebooting to Sierra was that my internal fusion drive appeared to be broken. It didn't mount and Sierra's Disk Utility listed my internal fusion drive as an Unformatted Internal Physical Disk. SSD portion undetectable. Sierra's Startup Disk System preference didn't list my fusion drive to reboot to. Luckily I have multiple external hard drives here, so I rebooted to a drive with OS X 10.11.5. From there my fusion drive reappeared and I could selected it to reboot from. Thankfully no data loss. I did do a complete Time Machine backup prior to my experiment.
Anyone else try macOS Sierra from an external drive and their internal fusion drive wasn't mountable like this?
Unfortunately I cannot recover via TimeMachine or Carbon Copy Cloner because my USB drive will not mount. I guess the only foolproof backup would be an internal hard drive.I just fixed mine by reverted back to my back up... Restart computer hold command and R select backup time machine make sure HD is connected and just hit next
RoadKing - you were right. The "control R" recovery option did give me access to my drive. Four hours from now I will be a happy camper.Unfortunately I cannot recover via TimeMachine or Carbon Copy Cloner because my USB drive will not mount. I guess the only foolproof backup would be an internal hard drive.
We heard that macOS Sierra was more secure, so we installed it on all our bank's corporate and financial processing computers! Siri really makes it a breeze to look up a customer's financial information. When someone comes up to the front desk at one of our 100,000 locations, we just say something like, "Hey, Siri, what's John's account number and pin?" or "Hey, Siri, what financial transactions did Sally have in the past month?" and it reads everything off to us.Installing this on my company's mission critical computers. Wish me luck!