Due to a new signed Apple Certification, any Mac Client Packagers created prior to January 1st, 2020, will need to be recreated after freshly downloading the Mac build files.
The link to the build file has remained the same: http://updates.thirtyseven4.com/builds/2016/eps7.4/mclsetp.7z
To compile the new build, please follow the instructions given in the Client Packager utility after selecting Mac for the Operating System.