Where is the icon used in this dialogue box? Where on my disk can I find the icon used in this dialogue box in OS X？



It may be Security.icns in OS X 10.7.3



I cannot find it in:


/System/Library/CoreServices/CoreTypes/Contents/Resources
There are only LockedIcon.icns and UnlockedIcon.icns in this folder who looks like the icon in the dialogue box,the size of the icon in the dialogue box is 128x128px, but LockedIcon.icns and UnlockedIcon.icns is 32x32px.


lockedIcon.icns



So they are not the same icon.


/System/Library/CoreServices/Finder.app/Contents/Resources/
/System/Library/CoreServices/Problem Reporter.app/Contents/Resources
/Applications/System Preferences.app/Contents/Resources
/Applications/Utilities/Keychain Access.app/Contents/Resources
/System/Library/CoreServices/Certificate Assistant.app/Contents/Resources/
Lock Icon

The lock icon is located in 

/System/Library/CoreServices/SystemAppearance.bundle/Contents/Resources/Assets.car



Install Theme Engine

Note: You may want to download the released version.
Open the file
Select Security
Drag the icon to the desktop to convert to a png




Finder Icon

macOS just places the app icon in front of it.