This Mac can't connect to iCloud because of a problem with

Hi. So, I've been trying to get my iMessage and FaceTime to work. So far, I've obtained the correct serial number and set my current internet network to en0. However, when I try to sign in to iMessages, I get a dialog box saying that 'This Mac cannot connect to the iCloud because of a problem with <my Apple ID>'. Then, I get two options, Later or Change iCloud Settings or something like that. If I choose the second option, I'm taken to the iCloud preference pane, wherein I have to enter my Apple ID password. But when I click on 'Sign In', I get an 'Unknown error has occurred' message. After trying to sign in for two times, it asks me to reset my Apple ID password. If, during any of this, I hit Cancel, the iMessage window (yeah, that was open the entire time) pops up a 'unknown error has occurred during activation. Try Again.'

One thing I should probably mention, is that I've had this hackintosh running for more than 3 months now, and I've got the 'This Mac can't connect to the iCloud' message, every time I've booted up my system.

Same for FaceTime.

Has anybody figured it out?