On Feb 21, 2014, at 5:33 AM, Uli Kusterer <witness.of.teacht...@gmx.net> wrote:

> On 20 Feb 2014, at 20:58, Bradley O'Hearne <br...@bighillsoftware.com> wrote:
>> At WWDC 2013, I approached the Apple engineering teams with a need that a 
>> client of mine had to disable all screen capture while an app was running. 
>> This includes the hotkeys for taking screenshots, capturing displays with 
>> AVFoundation, remote desktop apps, Airplay, etc. As to the specific use case 
>> in play here, the issue is that there is proprietary content delivered via 
>> the app — and the owners of this content need that content secured such that 
>> there is no easy facility *on the machine it is running on* to capture this 
>> content. Please forgive the length of what follows, but a little explanation 
>> is necessary. 
> 
> 
> I would expect NSWindow's -setSharingType: NSWindowSharingNone method to 
> allow doing that. Have you tried that?

Uli — thanks for the reply. I would have expected the same thing, but it 
doesn’t prevent either Command-Shift-3 or Command-Shift-4 screen shots, nor 
screen recording (such as in QuickTime or with a tool like ScreenFlow). Kind of 
a dubious property naming given that it doesn’t really prevent sharing of 
window content. 

Brad
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