.

Likewise, does iMac have Thunderbolt port?

Your iMac also has two ports that support Thunderbolt and Thunderbolt 2. Thunderbolt is an input/output (I/O) technology that supports high-resolution displays and high-performance data devices. Thunderbolt gives you two channels on the same connector, each with 10Gbps of throughput in both directions.

Also Know, what version of Thunderbolt does my Mac have? If you have a MBP Retina from Late 2013 or later, a Mac Pro (2nd gen), late 2014 Mac Mini, 5K iMac or early 2015 13 inch MacBook Air than Thunderbolt 2. All others have Thunderbolt 1. Go to the Apple logo in the top left corner and press About This Mac to find the year of your MBP.

Then, can I use 2009 iMac as monitor?

Yes an iMac will work as a screen for a regular PC, but only with 27" models of Late 2009, 2010 iMacs. Note: If you are connecting two 27-inch iMacs, connect a Mini DisplayPort cable to each computer and press Command + F2 on the 27-inch iMac keyboard that you will use as an external display.

Does mid 2009 MacBook Pro have Thunderbolt?

The only way a ThunderBolt Display will work is to be connected to a ThunderBolt port on a computer. The 2009 MBP does not have a ThunderBolt port. Thunderbolt and Mini DisplayPort look the same, except Thunderbolt has a lightning bolt symbol next to it.