Seems like it is all PDF's. Here's a relaible test file. I saved it from Safari -won't open. Saved from Firefox -OK.
At this URL click on PDF version of map (to the right of JPG image of map):
None of the above remedies worked for Safari. I can open any PDF that I download from Firefox, but the Safari PDF downloads won't open in Preview, Adobe Reader, Acrobat Pro, Photoshop, etc. The error prompt I get is: "There was an error opening this document. The file is damaged and could not be repaired."
I guess I could uninstall Safari, but I don't want to have to replace all my links, bookmarks, etc. Seems like the plugin might be corrupted?
Don't uninstall Safari.
Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. For instructions, launch the System Preferences application, select Help from the menu bar, and enter “Set up guest users” (without the quotes) in the search box. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem(s)?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode* and log in to the account with the problem. The instructions provided by Apple are as follows:
- Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
- When you see the gray Apple logo, release the shift key.
- If you are prompted to log in, type your password, and then hold down the shift key again as you click Log in.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
*Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode.
Test while in safe mode. Same problem(s)?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of steps 1 and 2.
I had the same problem. Temporarily I resolved it by unclicking Allow Plug in. Do the following
Click Safari-Preference-Security-Internet Plug in - unclick Allow Plug in .
This indicated that one of the pdf plugin is causing the problem. So I tested and found that the plug in
AdobePDFVieweNPAPI.plugin is the culprit. By removing it resolved the issue and now I can open pdf files saved in Safari.
To delete this plug in do the following
Finder-Mcintosh HD ( assuming it is your OSX drive) -Library-Internet Plug ins- Then locate and delete AdobePDFVieweNPAPI.plugin
I moved it to my desktop so I can retrieve it in case something else does not work.
So far happy and special thanks to Linc Davis for providing the hint to my solution.