# KbDemo not working, Mac OSX Catalina

**URL:** <https://psychtoolbox.discourse.group/t/kbdemo-not-working-mac-osx-catalina/3042>\
**Category:** Bugs & Features\
**Tags:** macos\
**Created:** [February 13, 2020, 4:26pm UTC](https://psychtoolbox.discourse.group/t/kbdemo-not-working-mac-osx-catalina/3042 "2020-02-13T16:26:18Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\
**Post date:** [April 8, 2020, 2:26am UTC](https://psychtoolbox.discourse.group/t/kbdemo-not-working-mac-osx-catalina/3042/12 "2020-04-08T02:26:45Z")

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So basically a totally broken security UI workflow in Apples latest macOS Vista trainwreck. That’s not a Matlab bug for sure. It’s a sign of poor operating system engineering that a piece of standard userspace application software that is not close to system level would need to frequently adjust to a new OS version. From the category “Only in the magic world of Apple”.

I’m pretty sure the only way to be sure your camera can’t spy on you on _any_ OS + hw combo is to put a sticker over it. And disconnect the microphone with some physical switch. Apple macOS btw. just had this very recently fixed major security flaw wrt. camera spying revealed:

[https://news.ycombinator.com/item?id=22766138](https://news.ycombinator.com/item?id=22766138)

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