After updating my Intel based MacBook Pro to macOS Sonoma, I noticed an immediate increase in CPU temperatures, fans at full blast, and even some applications started freezing. When I attempted to identify the root causes, the Activity Monitor and Terminal crashed at every attempt.
I did not have any unbacked up data in the MacBook, therefore I decided to downgrade it to the previous operating system version, macOS Ventura, but the laptop kept looping into the “macOS Recovery over the internet”, and displaying the error code -1008B when it finished loading after 10 minutes or so.
This error means that the device, according to Apple’s website, has an activation lock because its connected to an iCloud / Find My account, and removing it from there usually resolves the issue, but this time it only went away when the boot keyboard shortcut to clear the PRAM and NVRAM was used.
Hope this helps with the issue.
