San Diego, California-based Xcelerated Systems Inc says that it will do an implementation of its X Window-based Liken software, which creates a Macintosh System-compatible environment on a Unix machine, for IBM Corp’s RS/6000 boxes, intending to make it generally available to IBM’s worldwide customer base in the first quarter of 1993. IBM came to the company with the notion, Xcelerated says. It still has to be decided whether IBM sells it or how to avoid confusing users because of IBM’s ties with Apple Computer Inc. Insignia Solutions Ltd of Leeds and Mountain View, California, is also doing an implementation of SoftPC 3.0 for the RS/6000, describing it as its last significant version of the 3.0 release of the MS-DOS emulation software. Insignia now needs to do a Windows package and an 80386 emulation to accommodate OS/2.