I just got an Epson EX3200 and love it.  Fairly affordable (compared to some options) and very clear picture even in a light room.  I don’t think there is any issue with MacBooks – I think it’s just a matter of getting an adaptor but I’m a PC girl so if anyone can shed light on that, please chime in.

@kathyweir something that we began doing in one of our meeting/training spaces is using a large flat screen television that we plug into. It is mounted so others can see and has been working great. We still use projectors as well and the one Andrea recommended is a good one! It really depends on the size of the training space, projection wall/screen, etc. in regard to what will work best. Be sure to look for HDMI plug-ins or the adapter for VGA. A few people have Macbooks in the office and they frequently use the Mini DVI to VGA adapter so they can use all of the different projection equipment!