Your friend really needs an iMac with better spec's (16GB and SSD) to upgrade past High Sierra and run MS Office at the same time. Which Mac OS runs best on a late 2013 iMac with 8 GB RAM and no SDD?
Will Office 2019 install on an earlier OS? My impression is that High Sierra, Mojave, and Catalina won't run well on a late 2013 iMac without a SDD. MS says Office for Mac is supported on only the three most recent versions of macOS. It's currently running Yosemite, but she wants to install Microsoft Office 2019. A friend of mine, who is a light computer user, just 'inherited' a 21.5' iMac 2.7GHz i5 / 8GB RAM / 5400 rpm HDD.
