uudecode(1) on macOS
The text 13ad2510682a, as Mac OS X 10.5.8, Mac OS X 10.5.7, Mac OS X 10.5.6, Mac OS X 10.5.5, Mac OS X 10.5.4, Mac OS X 10.5.3, Mac OS X 10.5.2, Mac OS X 10.5.1, Mac OS X 10.5 shipped it.
encode/decode a binary file
Flags it lists
-
-c -
-i -
-m -
-o -
-p -
-s