That could be the driver. If the mac driver U use have poor openGL support i wont work. If you run VMWare the driver there could do work better. Just try if there is an up to date driver. Dont know if you get third party drivers on macs. I had this issue often on PC. Noggit runt here after the isntallation of an newer driver for the GFX board.
I love third party drivers. So i can use my scanner now from win 95 to win 7
manufacturer functions like calibration of the printer, or scanners with dia function. You need always drivers that know the device to use all functions of it. For the basic like scan an image or print a document its enough
That depends on how the manufactur build the device.A dia scanner needs other focusing, turn light on behind the scan area and control the scanner to scan the right areas to get the single Dia´s