We have already noticed for a few days that the delivery time for the top-of-the-line model of the MacBook Pro has increased considerably, opening the possibility of it being updated perhaps at WWDC 2015.

But today the French website MacG.go, which has a good track record of success in rumors related to Apple, said [Google Tradutor] that both the 15 ″ MacBook Pro how much 27 ″ iMac may be updated as early as next Wednesday (5/20).
The 15 ″ MacBook Pro really deserves an upgrade to keep up with the 13 ″ model, which received improvements including the new Force Touch trackpad a few months ago. As for the iMac, the website does not specify whether or not it is the model with Retina 5K screen; but if so, it would be his first update since it was released in mid-October last year.
If the rumor is really hot, we shouldn’t expect anything very bombastic about these upgrades. Routine thing, really.
[via 9to5Mac]