I was running macOS 10.15.4 on a 2017 3.5 GHz i5 iMac. I tried to download the update to 10.15.6. After a couple of progress bars, the screen went dark and didn't come back. I waited a few minutes, then tried cycling power, and then tried cycling power with the Option key held down. Nothing worked; the machine wouldn't boot and the screen stayed dark. I took the machine to a Mac technician and he confirmed: the machine was bricked.
Even though the machine was still under extended warranty, I didn't want to be without a computer for several weeks while waiting for a repair. I went to the nearest Apple Store and bought a new 2020 3.8 GHz i7. Fortunately, I had backed up the internal SSD on the older machine with SuperDuper before trying the update, and I was able to transfer all my apps and associated files to the new machine and get back to where I had been before the crash. I can get the older machine fixed under warranty and then sell it.
I found that the new machine is running 10.15.6, and there is a notice to install a 10.15.6 Supplemental Update.
I'm gunshy about running another Catalina 10.15.6 updater. Has anyone else seen this happen? Thanks.
Even though the machine was still under extended warranty, I didn't want to be without a computer for several weeks while waiting for a repair. I went to the nearest Apple Store and bought a new 2020 3.8 GHz i7. Fortunately, I had backed up the internal SSD on the older machine with SuperDuper before trying the update, and I was able to transfer all my apps and associated files to the new machine and get back to where I had been before the crash. I can get the older machine fixed under warranty and then sell it.
I found that the new machine is running 10.15.6, and there is a notice to install a 10.15.6 Supplemental Update.
I'm gunshy about running another Catalina 10.15.6 updater. Has anyone else seen this happen? Thanks.
