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What is the maximum serial port speed for a Macintosh computer?

April 26, 2017Computer Macintosh maximum port serial speed

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What is the maximum serial port speed for a Macintosh computer?

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Macintosh computer serial (COM) port speed maximums vary. Refer to the Technical Information guide which came with your Macintosh computer or call Apple Support. Macintosh models with low serial port speeds can be upgraded by adding an internal card. Creative Solutions, (800) 367-8465, offers an internal card with either two or four serial ports capable of 57.6 Kbps each for a maximum of up to 115.2 Kbps or 230.4 Kbps. Note that the 3ComImpact IQ 3C882 ISDN modem currently supports serial port speeds of up to 230.4 Kbps.