updated 10:51 am EDT, Wed June 11, 2014
Could upgrade ports to Thunderbolt 2
Apple will launch a 2014 iMac refresh next week, sources say. The people tell French site MacGeneration that CPU speeds should increase by about 100MHz for each model via recently-introduced Intel processors. 21.5-inch iMacs are expected to use the 3GHz i5-4590S and the 3.2GHz i5-4790S. 27-inch systems will have access to the 3.3GHz i5-4690, 3.5GHz i5-4690, and 3.6GHz i7-4790.
The sources make no mention of possible Retina support. They do however suggest that Apple may include faster Thunderbolt 2 ports, and announce the refresh later in the week, instead of on Tuesday as Apple often does. There had been some anticipation that Apple would reveal new Macs during June 2nd's WWDC keynote, but instead it concentrated exclusively on OS X and iOS.