About Us We have been using Apple Macintosh computers to run Polymorphic Services, Inc. (PSI) since 1984. During that time we have gained a wealth of knowledge and experience pertaining to the care and feeding of Macintosh computers, getting them to inter-operate with PCs, networking, printers, etc. Our offices are totally Mac based. PSI has been a member of the Apple Developer Connection since 1991. We are familiar with all versions of the Macintosh Operating System from 7.5 through 10.4.9.
In 2002, PSI decided to offer its Macintosh expertise to the public as a separate line of business, and NJ Mac Doctor was born.