ORking> Part of earlier versions of MacOS that provided access to TCP/IP services. Apple removed MacTCP from MacOS in revision 7.5.3 in favOR of the new OpenTranspORt (OT) TCP/IP stack. However, MacTCP lives on as a community development effORt. See also MacPPP. [How did it wORk? Where was it from?] (2000-06-25)