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first second of several youtube videos is missing. yosemite 10.10.3, safari 8.0.6. clean reinstall didn't help. problem appears on several macs. apple support isn't able to help. no problems at all with google chrome and safari developer mode>user agent>safari 7.6.1.


here's an example video:
User uploaded file

anybody got the same problems??

MacBook Pro (13-inch Mid 2012), OS X Yosemite (10.10.3)

Posted on May 20, 2015 9:31 AM

Reply
32 replies

May 20, 2015 9:41 AM in response to fred_logan

1. System Preferences > Flash Player > Advanced > Delete All

Press the "Delete All" button under “Browsing Data and Settings”.


Install Adobe Flash Player.

http://get.adobe.com/flashplayer/


Download it first.

The next step is important.


Click Safari in the menubar and select “Quit Safari”.

Follow the prompts and install it.

Restart computer. Relaunch Safari.


2. Allow Plug-ins

Safari > Preferences > Security

Internet Plug-ins > "Allow plug-ins"

Enable it.


3. Safari > Preferences > Privacy > Cookies and website data:


Press the “ Remove All Website Data” button.

Press the “Details” button.

Remove YouTube related cookies.


4. Safari > Preferences > Extensions

Turn all extensions off, relaunch Safari and test.

Turn those on one by one and test.

May 21, 2015 8:22 AM in response to fred_logan

Try a restart.


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

Try setting up another admin user account to see if the same problem continues. If Back-to-My Mac is selected in System Preferences, the Guest account will not work. The intent is to see if it is specific to one account or a system wide problem. This account can be deleted later.


Isolating an issue by using another user account

Try booting into the Safe Mode using your normal account. Disconnect all peripherals except those needed for the test. Shut down the computer and then power it back up after waiting 10 seconds. 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 and again when you log in. The boot up is significantly slower than normal. This will reset some caches, forces a directory check, and disables all startup and login items, among other things. When you reboot normally, the initial reboot may be slower than normal. If the system operates normally, there may be 3rd party applications which are causing a problem. Try deleting/disabling the third party applications after a restart by using the application un-installer. For each disable/delete, you will need to restart if you don’t do them all at once.


Safe Mode - About



Safe Mode - Yosemite

May 28, 2015 3:08 AM in response to fred_logan

1. Delete Safari .plist file.


Quit all applications. Click on an empty spot on the desktop to activate Finder.

Hold the “Option” key down and click the "Go" menu in the Finder menu bar.

Select “Library” from the drop down.


Library > Preferences > com.apple.Safari.plist


Right click on it and select "Move to Trash". Close Finder window.

Please don’t empty the Trash.

Restart. Launch Safari and test.



Put back the com.apple.Safari.plist


If this doesn’t help, right click on the Trash icon in the Dock and select “Open”


Right click on the com.apple.Safari.plist and select “Put Back”.

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