The most common reference for "cctools" is the set of development tools (like as, ld, and otool) used for Apple’s Darwin operating system and Xcode.
Why would someone want the “full” version? cctools 65 full
: An active storage cluster filesystem designed for executing complex scientific workflows with high data locality. The most common reference for "cctools" is the
on Linux. A "deep dive" into a specific internal version like cctools-65 cctools 65 full