adobe

Try https://get.adobe.com/air/

You, or someone else using your computer, may have hacked the system to redirect queries to certain servers. The file modified is /etc/hosts.

The easiest way to fix the hosts file is to restore it from a backup that predates the modification, or to copy the unmodified file from another Mac. Sometimes there is an unmodified copy with the name "hosts~orig" alongside the modified hosts file on the same Mac; if so, you can copy the contents of that file into the hosts file. Ask for guidance if you need it.

If you can't do any of the above, please see below.

Back up all data before proceeding.

If you have more than one user account, you must be logged in as an administrator.

Triple-click anywhere in the line below on this page to select it:

open -e /etc/hosts

Copy the selected text to the Clipboard by pressing the key combination command-C.

Launch the built-in Terminal application in any one of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

Paste into the Terminal window by pressing command-V. I've tested these instructions only with the Safari web browser. If you use another browser, you may have to press the return key after pasting.

A TextEdit window should open. At the top of the window, you should see this:

##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost

Below that, you may see some other lines. The first 9 lines should be exactly as above, apart from differences in the blank space within lines. Otherwise you can't use this procedure—STOP and ask for guidance.

If the contents of the TextEdit window are as described, and there are extra lines in the file, close the window, then enter the following command in the Terminal window in the same way as before (by copy and paste):

sudo sed -i~ '10,$d' /etc/hosts

This time you'll be prompted for your login password, which won't be displayed when you type it. Type carefully and then press return. If you don’t have a login password, you’ll need to set one before you can run the command. You may get a one-time warning to be careful. Confirm. Quit Terminal.

If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator. Log in as one and start over.

That will fix the hosts file. There is now a copy of the old hosts file with the name "hosts~" in the same folder as "hosts". You can delete the copy if you wish. Don't delete the file named "hosts".

Please double-click anywhere in the line of text below on this page to select it, then copy it to the Clipboard by pressing the key combination command-C:

airdownload.adobe.com

Launch the Network Utility application.

Step 1

Select the Lookup tab and paste into the address field by pressing command-V. Then press return. Post the output that appears below – the text, please, not a screenshot.

Step 2

Select the Ping tab and do the same. Please enter the same input as you did in Step 1. Don't use the output of Step 1 as input to Step 2.

You didn't copy the line specified in the last set of instructions. Please try again.

I guess the instructions are unclear, but I'm not sure why. You need to copy and paste this line:

airdownload.adobe.com

Not the one you did copy and paste.

From the menu bar, please select

 ▹ System Preferences... ▹ Network ▹ Advanced... ▹ DNS

Under DNS Servers you should have one or more numerical addresses, such as “192.168.1.1” or “10.0.0.1”. What are those addresses?

Please back up all data.

Unlock the Network preference pane, if necessary, by clicking the lock icon in the lower left corner and entering your password. Cllck Advanced, open the DNS tab, and change the server addresses to the following:

8.8.8.8

8.8.4.4

That's Google DNS. Click OK, then Apply.

In Safari, select

Safari ▹ Preferences... ▹ Privacy ▹ Remove All Website Data

and confirm. If you’re using another browser, empty the cache. Test. Any difference?

Notes:

1. If you lose Internet access after making the above change to your network settings, delete the Google servers in the Network preference pane, then select the TCP/IP tab and click Renew DHCP Lease. That should restore the original DNS settings; otherwise restore them yourself. Remember that you must click Apply in order for any changes to take effect.

2. I don't use Google DNS myself, though I have tested it, and I'm not recommending it or any other DNS provider; the server addresses are offered merely for testing purposes. There may be privacy and technical issues involved in using that service, which you should investigate personally before you decide whether to keep the settings. Other public DNS services exist.

I wouldn't consider Google DNS to be a permanent solution, if I were you. Something is wrong with your router settings. You were using it as a DNS proxy. The DNS servers that it uses are not working, apparently.