Hi. As per this thread my 2015 iMac that boots from an external SSD has been close to unusable since upgrading to Monteray. Booting takes up to 25 minutes and then the system can be very unresponsive.
A look on the internet shows lots of people seemingly having this problem and associating it with Intel Macs booting off external drives.
To help my diagnosis and sanity, can I ask whether anyone else is experiencing this, and just as importantly, is anyone with an Intel iMac booting from an external drive able to boot into Monteray without any problems?
p.s. It’s a SanDisk Extreme SSD