Block Adobe Activation Servers for CS4 and CS5 via HOSTS file

Caution: Downloading and using any leaked builds or any hacked/cracked version of any software is not only illegal and a crime punishable by law, but also pose great security risks and should be avoided. The information posted here is for news purposes only and any illegal links posted in comments will be deleted.

Do you ever get this error message?

If you use a key generated serial without using this hosts file technique, It will not work permanent and gives you the error above again and again… Remember Serials may be different but hosts file editing is same required for one time only so make it now and use all Adobe cs4 and cs5 products with a key generated serial number…

Adobe CS5 Hosts File Editing

Windows / Windows 7 / Windows XP

Step 1: Under windows 7 go to this path “C:\Windows\System32\drivers\etc” there you can see some files. We just need to work with hosts file. First we will copy this file and paste to somewhere else as a backup so if anything goes wrong we can replace that with our edited one.

Step 2: Now click on your start button search for Notepad, right-click and select Run as Administrator. This should launch notepad with all possible privileges. Now open the hosts file from the directory path: “C:\Windows\System32\drivers\etc” if no file displayed, you have to display All Files by typing (*) in the box. It will show you all files of this directory. Now you can open hosts file from there. (remember the above path won’t show any file if you try it without star number: (*) You have to use it to see the All Files)

Step 3: Now the file is front of you check the last line which is “# ::1 localhost” and paste the below lines right after it.


Editing the hosts file Editing the hosts file in Mac OS X – Leopard, is a pretty easy task, especially if you are familiar with the terminal.

Step 1: – Open the Either by start typing Terminal on the Spotlight, or by going into Applications -> Utilities -> Terminal.

Step 2: – Open the hosts file Open the hosts by typing on the Terminal that you have just opened:

$ sudo nano /private/etc/hosts


Type your user password when prompted.

Step 3: Edit the Hosts File The hosts file contains some comments (lines starting with the # symbol), as well as some default hostname mappings (e.g. – localhost). Simply append your new mappings underneath the default ones. Or edit one of the default values if you know what you are doing! You can navigate the file using the arrow keys.

Step 4 – Save the hosts fileWhen done editing the hosts file, press control-o to save the file. Press enter on the filename prompt, and control-x to exit the editor.
Step 5 – Flush the DNS cache
On Leopard you can issue a simple Terminal command to flush the DNS cache, and have your host file changes to take immediate effect:

$ dscacheutil -flushcache



Enter the following entries in the HOSTS file:


Comments 6

  • Hi,
    I am new at this whole unix/terminal thing and to be honest quite nervous to dive in for fear or ruining my new mac.
    Here is my dilemma……I HAD Adobe CS4 installed on an older imac that I had (2010 model)– It worked flawlessly, I bought a new macbook air, running OS 10.8, transferred all of my files from old mac to the new macbook sold the old mac after zeroing the drive and now I am getting a message when I go to launch any of the CS4 apps “Excuse the interruption, but our records indicate that this serial number has already been used to set up and activate
    Creative Suite (CS4)″
    I am hoping that someone can point me in the direction of productivity and more over happiness. I need this software to work again without the 30 day count down until the software no longer works….I understand that I need to edit a host file in my mac but I am unsure how to exactly do it, where to add the code(s) to, what NOT to do, and what code to add so that this Adobe activation thing will go away.
    Please Heeeeeelp!
    Thanks in advance, much appreciated!

  • So, will this work for cs6.

  • Hi there. Should this still work? It doesn’t work for my version of photoshop CS4. Perhaps the software has been amended since this fix?

  • This is bad. You have unnecessary lines included that have nothing to do with Adobe’s services:

    Remove these.

  • When I try to save it popped up Access Deny

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