How do I add includePath to find headers like <CoreFoundation/CoreFoundation.h> with OS X/iOS SDK? I haven't found a way yet.

See Specifying Additional Include Directories for Better Symbol Support. in https://code.visualstudio.com/docs/languages/cpp
@sridmad It doesn't solve my problem, Framework directory structure is not possible to express in includePath, as I clearly stated in my original comment. Please re-open this.
We will have to add the capability to specify frameworks. For the short term, if you add path to the root of the framework folder the headers should be picked up. This is ofcourse not feasible as a long term solution.
Example: "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/Foundation.framework"
Awesome, that's good enough for me. I will try this. Thanks!