The Developer Transition Kit is the name of two prototype Mac computers made available to software developers by Apple Inc. The first Developer Transition Kit was made available in 2005 prior to the Mac transition to Intel processors to aid in the Mac's transition from PowerPC to an Intel-based x86-64 architecture. A second Developer Transition Kit was made available in 2020 prior to the Mac transition to Apple silicon as part of its initiative to transition the Mac away from Intel to Apple's ARM64-based Apple silicon.