iMac can't read a small amount of videos

Opportunity on my iMac with Retina K 5 screen, OS X El Capitan (10.11.5), end of 2015 / 3.2 GHz Intel Core i5, I get the following message when you try to view videos on various sites, "this video is not encoded for your device.

Is not something specific to Safari (see screenshots), it also happens on Firefox and happens on the Web sites at random. I visit it more often - so I chose a video it, the intro advertisement plays very well when the actual content, and then begins the message appears.

My Macbook Pro on the same OS plays videos fine.

I've scoured the web and here but never find a solution or even a real hint as to why this is happening. Any wise software is 100% updated FYI.

Thanks in advance!


Try a reboot.

Make a backup using Time Machine or a cloning program, to ensure that data files can be recovered. Two backups are better than one.

Try to set up another admin user account to see if the same problem persists. If back to my Mac is enabled in system preferences, the guest account will not work. The intention is to see if it is specific to an account or a system wide problem. This account can be deleted later.

Isolate a problem by using a different user account

If the problem is still there, try to start safe mode using your usual account.  Disconnect all devices except those necessary for the test. Shut down the computer and then put it up after a 10 second wait. Immediately after hearing the startup chime, hold down the SHIFT key and continue to hold it until the gray Apple icon and a progress bar appear. Startup is considerably slower than normal. This will reset some caches, forces a check for directory and disables all start-up and connection, among other things. When you restart normally, the initial restart may be slower than normal. If the system is operating normally, there may be 3rd party applications that pose a problem. Try to delete/disable the third-party applications after a reboot using the UN-Installer. For each disable/remove, you need to restart if you do them all at once.

Safe mode - on El Capitan

Start Mode without failure-El Capitan.

Tags: Mac OS & System Software

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