{Big changes in Mac\TeX, and why users should never notice} {Dick Koch} {Just before the \TeX\ Live 2019 release, Apple developers received a notice about changes coming in mac\acro{OS}~10.15 for install packages and the programs they contain. After some panic, experiments convinced us that we can accommodate the changes. But if you wrote one of the binaries in \TeX\ Live, we could use your help, even if you never use a Mac.}