Baud Rate

What do (almost) all the examples involving serial communication use a baud rate of 9600 bps? If I'm communicating with my Mac, why would I not use, say, 115200 bps to ensure the fastest possible transmission? What is the disadvantage?

FieldDoc

9600 is just kind of a default for machines after a point in time, heck even my nearly 30 year old apple //c handles 9600 pretty well

If I'm communicating with my Mac, why would I not use, say, 115200 bps to ensure the fastest possible transmission? What is the disadvantage?

if you need to send data to the computer over serial as fast as possible do it, the disadvantage comes when your trying to use it for debugging your program and stuff flies across the screen that by the time you even think to react its a 1000 lines off screen. serial communication slows down the execution rate of your arduino, so if your trying to see what exactly is happening a slower baud rate may be helpful in eyeballing glitches.

Ah great, that makes sense.

Thank you.