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I'm curious - [SP] in Safari header???

In Safari - at the very top of the browser - where you see the title of the page...

[SP] appears after every title...


on blank browser windows it says untitled [SP]


any ideas what the [SP] stands for?

iMac 20 2.4ghz Intel Core 2 Duo, Mac OS X (10.7)

Posted on Jul 24, 2011 3:08 AM

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2 replies

Aug 28, 2011 9:36 PM in response to gagsy

Hi gagsy,


My Safari has the same problem, [SP] stands for Single-process windows,

should switch to multi-process mode to avoid this suffix.


turn on your terminal and put below command in:

defaults write com.apple.Safari IncludeInternalDebugMenu 1


log out and log in safari again, now you can see "Debug" tag on menu toolbar.

select the Use Multi-process windows


log out and log in safari again. the [SP] suffix should be gone.


remove the "Degug" from menu toolbar, just use the command:

defaults write com.apple.Safari IncludeInternalDebugMenu 0


But somehow, the safari goes to single-process mode occasionally when I reboot Mac, thus now i alway let the "Debug" on menu toolbar.

I'm curious - [SP] in Safari header???

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