Tips, Tricks and Technical Information

videoQC/4KScope macOS Validation

MacOSX UniversalNote: this area contains legacy information and is presented for reference only)

Apple's High Sierra operating system has changed the validation system, especially for applications downloaded from the internet. This has caused some systems to go into a 'validation loop' that stops our videoQC and 4KScope software from running, as the Apple validation never completes.  We are working on fixing this, but in the meantime, there is a way to stop the validation so our software can run.


Apple Validation Issue

If you run into this issue, removing the 'downloaded from the internet' bit will allow it to run.  This can be done by deleting the 'quarantine' bit set when it was downloaded/extracted from a download. Open a Terminal and run one of the following commands (this assumes you unpacked or copied 4KScope/videoQC to the Applications folder):

xattr -d /Applications/

xattr -d /Applications/

xattr -d /Applications/

Once that is set, you will be able to run the software.


Trademarks, Registered Trademarks, and Copyrights


Trademarks, Registered Trademarks, and Copyrights

Apple Inc. - Apple, the Apple logo, Final Cut, Final Cut Pro, Apple TV, iOS, iPad, iPhone, iPod touch, iTunes, Mac, Mac OS X, macOS, Shake, Final Cut Pro, ProRes, High Sierra, Mojave, M1, M2, and QuickTime are trademarks of Apple Inc., registered in the U.S. and other countries.
Drastic Technologies, Ltd. – trademarks specified here.
All other trademarks are the property of their respective owners.



For more than two decades, Drastic™ has been developing cutting edge digital video solutions for television, post production and sports broadcasting, from real time web delivery to 8K broadcast.

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