If you, like me, are giving several frequent lectures (2/3 per week during courses periods) you could have the problem of often plugging and unplugging a video-projector into your laptop.
In general when it comes to MacBook Pro and video output you have two options (actually three but only two really viable):
- use the Mini DisplayPort to VGA Adapter from Apple, 29€ (white adapted on the right)
- use an active HDMI to VGA Adapter (e.g. from Cable Matters), 22€ (black adapter on the left)