Problem opening PDF files with Preview

Have your tried viewing it with Quick Look?

As it is your companies PDF - has it been scanned with a virus/malware scan?

If the problem PDF's are all coming from the same outside source - they may have malware in them that is aimed at a windows PC but is picked up by your system as a courtesy so you don't pass it on.

Please follow these directions to delete the Mail "sandbox" folders. In OS X 10.9 there are two sandboxes, while in 10.8 there is only one. If you're running a version older than 10.8, this comment isn't applicable.

Back up all data.

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

~/Library/Containers/com.apple.mail

Right-click or control-click the highlighted line and select

Services ▹ Reveal

from the contextual menu.* A Finder window should open with a folder named "com.apple.mail" selected. If it does, move the selected folder—not just its contents—to the Desktop. Leave the Finder window open for now.

Log out and log back in. Launch Mail and test. If the problem is resolved, you may have to recreate some of your Mail settings. You can then delete the folder you moved and close the Finder window.

This action will delete any custom Mail stationery that you have created. If you want to preserve it, ask for instructions.

If you still have the problem, quit Mail again and put the folder back where it was, overwriting the one that may have been created in its place. Repeat with this line:

~/Library/Containers/com.apple.MailServiceAgent

Caution: If you change any of the contents of the sandbox, but leave the folder itself in place, Mail may crash or not launch at all. Deleting the whole sandbox will cause it to be rebuilt automatically.

*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select

Go ▹ Go to Folder...

from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.

I rebooted by mistake.

That doesn't matter.

wondering if I could move the new "com.apple.mail" to the Desktop and return the old one to it's original folder

As I wrote, you can quit Mail and put the folder back where it was, overwriting the new one. You may still have to recreate the state of the Mail viewer window.

From the Mail menu bar, select

Mail ▹ Preferences... ▹ General ▹ Default email reader: Mail

Did a search on Good Reader application - and it is designed specifically for IPAD and IPHONE - doesn't say anything about laptop/desktop.

As you have GoodReader on your Mac - did you buy it from the APP STORE $4.99 - did it come with the Mac update - or did you download for free somewhere? If you did download it - in relation to your problems when did it start?

-- Just remembered I have some XLS files that I converted to Numbers but kept the original anyway. Good Reader does open those on IPAD etc so you apparently can modify them and send them around .

Reason for question about where you got it - never a good idea to get it from a free site as it may have been tampered with enough to get you to accept something you don't want.

Back up all data.

This procedure will unlock all your user files (not system files) and reset their ownership, permissions, and access controls to the default. If you've intentionally set special values for those attributes on any of your files, they will be reverted. In that case, either stop here, or be prepared to recreate the settings if necessary. Do so only after verifying that those settings didn't cause the problem. If none of this is meaningful to you, you don't need to worry about it, but you do need to follow the instructions below.

Step 1

If you have more than one user, and the one in question is not an administrator, then go to Step 2.

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

sudo find ~ $TMPDIR.. -exec chflags nouchg,nouappnd,noschg,nosappnd {} + -exec chown $UID {} + -exec chmod +rw {} + -exec chmod -N {} + -type d -exec chmod +x {} + 2>&-

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

Launch the built-in Terminal application in any 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. Click Utilities, then Terminal in the icon grid.

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.

You'll be prompted for your login password, which won't be displayed when you type it. Type carefully and then press return. You may get a one-time warning to be careful. If you don’t have a login password, you’ll need to set one before you can run the command. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator.

The command may take several minutes to run, depending on how many files you have. Wait for a new line ending in a dollar sign ($) to appear, then quit Terminal.

Step 2 (optional)

Take this step only if you have trouble with Step 1, if you prefer not to take it, or if it doesn't solve the problem.

Start up in Recovery mode. When the OS X Utilities screen appears, select

Utilities ▹ Terminal

from the menu bar. A Terminal window will open. In that window, type this:

res

Press the tab key. The partial command you typed will automatically be completed to this:

resetpassword

Press return. A Reset Password window will open. You’re not going to reset a password.

Select your startup volume ("Macintosh HD," unless you gave it a different name) if not already selected.

Select your username from the menu labeled Select the user account if not already selected.

Under Reset Home Directory Permissions and ACLs, click the Reset button.

Select

 ▹ Restart

from the menu bar.

Please log in to the mail server via its web page and download one of the attachments you suspect of being corrupt. You want the same attachment that you can't open from Mail. Does it open?

Disclaimer: I know almost nothing about programming or the inner workings of computers but...

I was working on a project and downloaded four image/text files and had this same issue with a couple of different formats in Preview and Adobe Acrobat: PDF, JPEG, and a PNG. I got that same exact error. I also got the same exact error with a .lwo object file when opening it in Blender (CGI program) during the same session.

The files were downloaded originally and opened on a Linux machine and everything worked. When I transferred them to a flashdrive and brought them to my mac I got the same error messages.

I ended up going back to the source sites and re-downloaded them and then they worked (on both Linux and Mac). Can't explain it so...

If all else fails try re-downloading the document from the original source and try again.