Endpoint Protection client for Mac - 64-bit app
See Apple's support article HT208436 "32-bit app compatibility with macOS 10.13.4 High Sierra" at https://support.apple.com/en-us/HT208436.
SCEP version 220.127.116.11 runs as a 32-bit app, so it warns users about compatibility, displaying error "SCEP is not optimized for your Mac. This app needs to be updated by its developer to improve compatibility."
This error does not instill our supported users with much confidence about their security.
Jay Michaud commented
This affects around 1600 Macs (and their users!) at my university. Please make a 64-bit version of SCEP for Mac available in VLSC. Thanks!