After signing in, go to the following website, which is the download portal for Adobe products.
Go down to Adobe CS6 Master Collection and on Windows tab download 'File 1 of 2' and 'File 2 of 2'.
Open keygen and click on Generate.
Install Adobe CS6 with serial.
After putting serial you must get a message that says: “Please connect to the internet and retry”.
Select “Connect Later”.
After the installation is done, run any CS6 program such as Photoshop, Illustrator, etc.
A message will pop up about serial number activation.
Select “Having trouble connecting to the internet?” (it’s not a button, it’s part of the message).
You will get another message that says “No internet connection”.
Click on “Offline Activation”.
Click on “Generate Request Code”.
Paste request code on keygen and click on Generate.
Paste activation code on program and that's it.