how do i read pdf files on mac air, i have downloaded adobe reader and not working

Right click it and open in Preview or Adobe.

Have you tried that?

Otherwise go to the PDF file right click it and select Get Info. Select Open With and select Adobe and select Change all, this way every PDF file you have will automatically open with Adobe when you double click the file.

If you can't view PDF files in Safari, take these steps.

Back up all data.

Triple-click the line of text below to select it, the copy the selected text to the Clipboard (command-C):

/Library/Internet Plug-ins

In the Finder, select

Go ▹ Go to Folder

from the menu bar, or press the key combination shift-command-G. Paste into the text box that opens (command-V), then press return.

From the folder that opens, remove any items that have the letters “PDF” in the name. You may be prompted for your login password. Then quit and relaunch Safari, and test.

The "Silverlight" web plugin distributed by Microsoft can also interfere with PDF display in Safari, so you may need to remove it as well, if it's present.

If you still have the issue, repeat with this line:

~/Library/Internet Plug-ins

If you don’t like the results of this procedure, restore the items from the backup you made before you started. Relaunch Safari again.

Don't feel stupid. We understand. You are new at this.

Go to the email, and press with both fingers on the pdf that is attached to the email. You should get something like this:

then move the mouse to Open With and you should get something like this:

Then move your mouse cursor to Preview.app or Adobe and click on it.

Hope this helps.

Oh I see what's happening... I think. you must not be clicking on the actual PDF file.

When you click on a web page with both fingers you get the following:

and when when you on a link you get:

Which is what you are describing. You must not be actually clicking on the PDF file.

Can you open the email where you have this PDF file and upload a screen shot of it? So that I can see.

To simply do this, hold down Command-Shift-4 and then hit the space bar. then tap on the email window. This will take a picture of the window and save it to your desktop. Then reply to this message and in the editor box click the "Camera" Icon to include this screenshot from your desktop.

This way I can see what the problem is. Thanks.

Is this what your email looks like?

To clarify further, you said "The PDF is in an email." But I believe you are not using a mail program to read that email. It sounds to me like you're using Safari to read the email by a webmail method.

Also, in your first post, you said "I have downloaded Adobe Reader ...". Actually, Apple is expert at reading PDF files with its native software. Once you get the attachment downloaded onto your Mac, you can use Apple's native app Preview (included with Mountain Lion) to read it.

Glad that helped! For the future, instead of using webmail on your Mac, you might consider using the Mail program that's already on your Mac.

Here's an assistant to help set your email account up:

Mail Setup Assistant

i haven't used adobe reader on mac to read pdf files vb.net. but i have found a lot of pdf viewer which have such fuctions. you can give another try. but most of al, it is compatible with apple.