Question: can i connect my dell laptop to my imac screen?
Answer: You can connect the Dell laptop straight to the Dell monitor, but the iMac cannot be directly used as a monitor for a PC. ... This is called Target Display Mode and no it will not work on a 2011 21.5" iMac. The ONLY iMacs that supported this for PC's were late 2009 and 2010 27" iMacs, 21.5" models did not support it.