Safari 6.1 and YouTube

I'm having trouble watching YouTube on Safari. I'm using 10.7.5, Safari 6.1, on a MacBook (early 2008). What I am finding is that PluginProcess from the WebKit2 framework is attempting to access Scripting Additions in the Library and Users Library, and sandboxd is denying access. sandboxd is using so much CPU (usually around 50%) that it causes the Flash to pause for about a second. This process happens every 5 to 10 seconds.

I am on a 30 Mbps line, so bandwidth is not an issue. The feed line (gray) always exceeds the play line (red). I have disabled all extensions and plugs except Flash Player. The pausing problem still exists with it stripped down to bare essentials. I do not have this problem on other video sites, unless there is a YouTube video embedded on the page. I am still getting the sandboxd CPU issue showing in Console after I close all pages in Safari.

All I can ascertain is that Google is sending a request for scripting through Flash, initiated when accessing YouTube pages, persisting even when all browser windows are closed.

I do not have this issue in Firefox (which is loaded with blocking extensions) or Chrome or MacTubes. Console shows no issues whatsoever for any of these.

I am seeing a number of Google IP addresses in the access log, ranging in the 74.125.225.x and 74.125.227.x range while this effect is happening.

Here is a sample of the Console detailed report.

PluginProcess(4030) deny file-read-data /Library/ScriptingAdditions

Process: PluginProcess [4030]

Path: /System/Library/StagedFrameworks/Safari/WebKit2.framework/PluginProcess.app/Con tents/MacOS/PluginProcess

Load Address: 0x1095d7000

Identifier: PluginProcess

Version: ??? (???)

Code Type: X86-64 (Native)

Parent Process: Safari [4018]

Date/Time: 2013-11-19 20:59:43.593 -0600

OS Version: Mac OS X 10.7.5 (11G63)

Report Version: 7

Backtrace:

0 libsystem_kernel.dylib 0x00007fff9258dafa __open_nocancel + 10

1 libsystem_c.dylib 0x00007fff918b4033 __opendir2$INODE64 + 51

2 CarbonCore 0x00007fff9310bd71 FSMount::getIndexedDirectoryItem(unsigned int, unsigned int, unsigned int, char*, unsigned char*) + 283

3 CarbonCore 0x00007fff930bff9e PBGetCatalogInfoBulkSync + 941

4 CarbonCore 0x00007fff930bfbd4 FSGetCatalogInfoBulk + 66

5 OpenScripting 0x00007fff8cb283f4 _ZL13IterateFolderPK5FSRefP6AEDescsbb + 209

6 OpenScripting 0x00007fff8cb28cc6 _ZL13LoadAdditionsP6AEDesc + 502

7 OpenScripting 0x00007fff8cb293a0 HandleGDUT(AEDesc const*, AEDesc*, void*) + 260

8 AE 0x00007fff8b281c25 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned int, unsigned char*) + 200

9 AE 0x00007fff8b281b03 _ZL25dispatchEventAndSendReplyPK6AEDescPS_ + 38

10 AE 0x00007fff8b2819f7 aeProcessAppleEvent + 250

11 HIToolbox 0x00007fff887d4b69 AEProcessAppleEvent + 102

12 AppKit 0x00007fff8fc1b9c5 _DPSNextEvent + 1247

13 AppKit 0x00007fff8fc1b07d -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 135

14 AppKit 0x00007fff8fc179b9 -[NSApplication run] + 470

15 WebCore 0x000000010a2c7d91 WebCore::RunLoop::run() + 81

16 WebKit2 0x00000001096d7301 int WebKit::ChildProcessMain<WebKit::PluginProcess, WebKit::PluginProcessMainDelegate>(int, char**) + 627

17 PluginProcess 0x00000001095d8b7f

18 PluginProcess 0x00000001095d8a78

Binary Images:

0x1095d7000 - 0x1095d9fff com.apple.WebKit.PluginProcess (7537 - 7537.71) <860F975C-6016-3787-9AC7-1B9179234C0E> /System/Library/StagedFrameworks/Safari/WebKit2.framework/PluginProcess.app/Con tents/MacOS/PluginProcess

0x109648000 - 0x1098affff com.apple.WebKit2 (7537 - 7537.71) <E54E27D0-AEFA-388C-B509-45BD726B6966> /System/Library/StagedFrameworks/Safari/WebKit2.framework/WebKit2

0x109f18000 - 0x10afbcfff com.apple.WebCore (7537 - 7537.70) <FAF8BC20-982F-33CD-B9B2-26185E15714A> /System/Library/StagedFrameworks/Safari/WebCore.framework/WebCore

0x7fff887c4000 - 0x7fff88af0fff com.apple.HIToolbox (1.9 - ???) <CCB32DEA-D0CA-35D1-8019-E599C8007AB6> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.fra mework/Versions/A/HIToolbox

0x7fff8b27e000 - 0x7fff8b2bdfff com.apple.AE (527.7 - 527.7) <B82F7ABC-AC8B-3507-B029-969DD5CA813D> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/AE.fram ework/Versions/A/AE

0x7fff8cb16000 - 0x7fff8cb33ff7 com.apple.openscripting (1.3.3 - ???) <F5E34F54-CE85-334B-8F25-53581D43960C> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/OpenScripting .framework/Versions/A/OpenScripting

0x7fff8fc13000 - 0x7fff90819fff com.apple.AppKit (6.7.5 - 1138.51) <44417D02-6123-3FC3-A119-CE51BB4C3006> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit

0x7fff91859000 - 0x7fff91936fef libsystem_c.dylib (763.13.0 - compatibility 1.0.0) <41B43515-2806-3FBC-ACF1-A16F35B7E290> /usr/lib/system/libsystem_c.dylib

0x7fff92577000 - 0x7fff92597fff libsystem_kernel.dylib (1699.32.7 - compatibility 1.0.0) <66C9F9BD-C7B3-30D4-B1A0-03C8A6392351> /usr/lib/system/libsystem_kernel.dylib

0x7fff930a2000 - 0x7fff933befff com.apple.CoreServices.CarbonCore (960.25 - 960.25) <4FC1AB30-022C-3C67-AC46-FDCBFCB7EEDE> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonC ore.framework/Versions/A/CarbonCore