Use MacBook Pro as second monitor for iMac? Is it possible to use a MacBook Pro as a second monitor for my iMac? Both of them have a Thunderbolt port.

If not, is there any other way?
You can not use your MacBook Pro as a second monitor for your iMac without additional software.

ScreenRecycler claims to allow you to expand your desktop across multiple computers.



As an alternative approach, Synergy (previously open source at synergy-foss.org) claims to lets you combine multiple computers into one. It will let you use both computers from a single keyboard and mouse.