Today, in preparation for upgrading to 5,1 to Mojave, I did a system drive backup using SuperDuper! to a USB drive. And as is my practice when I do such a backup I attempt to boot from that backup, to make sure that I can. And that's when things went bad.
I shut down. Powered up. Got the chime. And then nothing. The system had power but the monitors, 20 inch Apple Cinema Display and 23 inch Apple Cinema HD Display, stayed dark (the little white lights on the bezel lit up on both). The caps lock light on the keyboard did not light up when pressed. Curious.
I force power down, disconnected the USB backup drive, and powered up. Same result. I force power down, power up holding the option key. Same result. I start disconnecting things, leaving only the monitors and keyboard connected. I disconnect the power to system and monitors, wait a bit, and reconnect. I power up holding down Option-Command-P-R. Same result. I'm starting to get worried.
I disconnect everything, swap out the recently installed RX 580 Sapphire Pulse for the original GPU Radeon 5770, connect one monitor, and the keyboard. It starts up, I get the chime, and I boot into macOS Recovery. My start up drive, a Crucial SSD, looks fine. I select the Startup Drive UI but no drives are listed. Non-optimal.
I shut down.
I power up, again holding the option key. This time I get the boot drive selector and the SSD is listed. I select it and continue booting. The system boots up just fine. In System Preferences I confirm that the SSD is selected as the boot drive and then power down. I'm feeling better.
I swap GPUs, re-installing the RX 580. I hook up everything, monitors, external hard drives, other USB items, a USB 3 hub. I power up. Everything works fine.
So, any idea what went wrong? And what could I have done differently to have got back up and running faster? Thanks.
I shut down. Powered up. Got the chime. And then nothing. The system had power but the monitors, 20 inch Apple Cinema Display and 23 inch Apple Cinema HD Display, stayed dark (the little white lights on the bezel lit up on both). The caps lock light on the keyboard did not light up when pressed. Curious.
I force power down, disconnected the USB backup drive, and powered up. Same result. I force power down, power up holding the option key. Same result. I start disconnecting things, leaving only the monitors and keyboard connected. I disconnect the power to system and monitors, wait a bit, and reconnect. I power up holding down Option-Command-P-R. Same result. I'm starting to get worried.
I disconnect everything, swap out the recently installed RX 580 Sapphire Pulse for the original GPU Radeon 5770, connect one monitor, and the keyboard. It starts up, I get the chime, and I boot into macOS Recovery. My start up drive, a Crucial SSD, looks fine. I select the Startup Drive UI but no drives are listed. Non-optimal.
I shut down.
I power up, again holding the option key. This time I get the boot drive selector and the SSD is listed. I select it and continue booting. The system boots up just fine. In System Preferences I confirm that the SSD is selected as the boot drive and then power down. I'm feeling better.
I swap GPUs, re-installing the RX 580. I hook up everything, monitors, external hard drives, other USB items, a USB 3 hub. I power up. Everything works fine.
So, any idea what went wrong? And what could I have done differently to have got back up and running faster? Thanks.