December 2019 • Macworld 87for the latest version of the program’s updated
code. App developers who routinely revise their
apps earn our thanks for adding features, keeping
them up to date with the latest system changes,
and fixing bugs.
But developers also have to make choices.
While Apple allows coding styles that can preserve
backwards compatibility across several releases
of macOS, it adds to a developer’s burden and
sometimes holds an app back when it has to work
across a wide range.
If you haven’t updated an app in a while and
receive this error, it’s generally not possible to
download any interim update via the Mac App
Store that remains compatible with your version
of macOS. However, for software companies that