As of November 2024, installing Steam for the first time is no longer possible on OS X 10.11 to 10.14 and attempting to do so will result a deadlock or cause an error message, saying that it needs to be online to update or saying “Steam is no longer supported on your operating system version” in...
Situation: variety of intel-era iMacs currently running mucho paid-for 32bit production software at blazing speeds (i.e., Mojave from HFS+ partitions with MRT, Spotlight, notifications, and other annoying bits disabled). For obvious reasons, we cannot have these machines "upgrading"...