[PD] GEM and video playback broken in MacOS?

Johnny Mauser joson.android at googlemail.com
Tue Dec 28 21:33:34 CET 2021

Hi Dana and all,

I upgraded my personal computer to a new arm Mac  and can confirm, that Gem is not running properly out of the box. I don’t know whether I made a mistake, or it is the general situation, or what’s going on..

MacOS 12.1
Pd 52.1, Gem 0.94

Trying to create a Gem window leads to console showing: "[gemmacoswindow]: failed to init GLEW: your system only supports openGL-1.0“

When I open the backendinfo window from the help-patch of pix_video the [AVF-videoplugin $0] object could not be created.

Gem is loading and printing on startup:

GEM: Graphics Environment for Multimedia
GEM: ver: 0.94.git v0.94
GEM: compiled  on Feb 12 2019
GEM: maintained by IOhannes m zmoelnig
GEM: Authors :	Mark Danks (original version)
GEM:		Chris Clepper
GEM:		Cyrille Henry
GEM:		IOhannes m zmoelnig
GEM: with help by Guenter Geiger, Daniel Heckenberg, James Tittle, Hans-Christoph Steiner, et al.
GEM: found a bug? miss a feature? please report it:
GEM: 	homepage https://gem.iem.at/
GEM: 	bug-tracker https://bugs.gem.iem.at/
GEM: 	mailing-list https://lists.puredata.info/listinfo/gem-dev/
GEM: compiled for MMX/SSE2 architecture
GEM: using SSE2 optimization
GEM: detected 10 CPUs
GEM: image loading plugins: magick SGI STB imageIO jpeg tiff
GEM: film loading plugins: AVF quicktime4linux
GEM: image saving plugins: SGI STB imageIO jpeg magick tiff
GEM: model loading plugins: ASSIMP3 OBJ
GEM: video record plugins: QT4L
GEM: video capture plugins: AVF decklink

Any suggestions what to do?

Thx in advance, 


> Am 25.12.2021 um 22:19 schrieb Dana Moser <rosalux at curiousart.org>:
> Greetings.
> A colleague told me that I shouldn't upgrade to the
> Big Sur MacOS because starting with that release (and
> in all subsequent ones) GEM and video in general
> stop working. Can anyone verify this? And if it's
> true, have the GEM developers posted anything about
> future functionality?
> Thank you!
> -Dana Moser
> Mass. College of Art and Design
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> Pd-list at lists.iem.at mailing list
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