The Dells and iMac with the 'champion' on the table Coldplay • What If ∆ Although the pre-Thunderbolt iMac 27" 2009 has an MDP port for a second monitor, the remaining USB ports may be channelled to add as many monitors as there are available USB ports via a bang-for-buck USB multi-display adapter. It's a dodgy brand but the nifty Mountain Lion compatible adapter uses a DisplayLink powered hardware and retails at RM155.00 at Sri Computers, Low Yat Plaza, Kuala Lumpur. The DisplayLink driver in the enclosed disk is vintage but a URL is provided for the current version. Once installed, Displays in System Preferences shows up the USB monitor to calibrate, rotate, extend and/or mirror. Understandably, being USB driven, HD movies on the newfound monitor are a tad jittery, but excellent for web browsing, mails, word processing and general reading, which in portrait mode, just adds to the experience. The Dells that stand portrait to the iMac at home...