u/Distinct_Bee_8100

I reformatted and cleaned out older iMac 2011 ish with a view to giving to girlfriends kids for homework …. But runs 10.13 high sierra and nothing seems to run on it anymore.
Teams and Zoom all require newer OS but can’t update. Has anyone run a newer version booting off a dedicated boot SSD in the USB?? Not sure if this is even possible - I did do this with newer 5k iMac which is why I’m asking … thanks for responses in advance