# \#macos **URL:** https://psychtoolbox.discourse.group/tag/macos/13.md [Latest](https://psychtoolbox.discourse.group/latest.md) · [Categories](https://psychtoolbox.discourse.group/categories.md) · [Tags](https://psychtoolbox.discourse.group/tags.md) --- ## [Experimental direct OpenGL-to-Metal presentation backend for Psychtoolbox on Apple Silicon](https://psychtoolbox.discourse.group/t/experimental-direct-opengl-to-metal-presentation-backend-for-psychtoolbox-on-apple-silicon/5811)
**Author:** [@keith](https://psychtoolbox.discourse.group/u/keith)\ **Replies:** 11\ **Last updated:** [September 21, 2026, 7:15pm UTC](https://psychtoolbox.discourse.group/t/experimental-direct-opengl-to-metal-presentation-backend-for-psychtoolbox-on-apple-silicon/5811 "2026-09-21T19:15:24Z")
Motivation I have been investigating the presentation-timing problems affecting Psychtoolbox on Apple Silicon under recent macOS versions. In particular, ordinary drawing and unscheduled flips can appear to work, while s… --- ## [Screen GetImage](https://psychtoolbox.discourse.group/t/screen-getimage/5805)
**Author:** [@pscarfe](https://psychtoolbox.discourse.group/u/pscarfe)\ **Replies:** 2\ **Last updated:** [May 19, 2026, 8:37pm UTC](https://psychtoolbox.discourse.group/t/screen-getimage/5805 "2026-05-19T20:37:00Z")
I am not sure if this is expected behaviour, but on macOS Screen(‘GetImage’, window) Gives the Psychtoolbox startup window with the frog, regardless of what is on the screen. Specifying the back or draw buffer results … --- ## [Eyelink calibration freeze in fullscreen on Apple Silicon Macs](https://psychtoolbox.discourse.group/t/eyelink-calibration-freeze-in-fullscreen-on-apple-silicon-macs/5769)
**Author:** [@wenp97](https://psychtoolbox.discourse.group/u/wenp97)\ **Replies:** 3\ **Last updated:** [March 3, 2026, 8:24pm UTC](https://psychtoolbox.discourse.group/t/eyelink-calibration-freeze-in-fullscreen-on-apple-silicon-macs/5769 "2026-03-03T20:24:16Z")
Hi all, I’m having a problem getting Eyelink calibration to work in fullscreen mode on Apple Silicon setup with the new version of psychtoolbox. Setup: • Eye tracker: Eyelink 1000 Plus (v 5.15) • Computer: Apple M2 Ul… --- ## [Timing / Performance issues on macOS 26 Tahoe](https://psychtoolbox.discourse.group/t/timing-performance-issues-on-macos-26-tahoe/5767)
**Author:** [@keith](https://psychtoolbox.discourse.group/u/keith)\ **Replies:** 31\ **Last updated:** [December 21, 2025, 6:09pm UTC](https://psychtoolbox.discourse.group/t/timing-performance-issues-on-macos-26-tahoe/5767 "2025-12-21T18:09:22Z")
Something about Mac OS 26.1 seems to destroy the timing. Every frame flip is missed in VBLSyncTest and DotDemo, for example. Not sure if this is Matlab specific, because my Octave version had been updated to 10.3 and P… --- ## [License management on air-gapped devices](https://psychtoolbox.discourse.group/t/license-management-on-air-gapped-devices/5750)
**Author:** [@hakam.nkassis](https://psychtoolbox.discourse.group/u/hakam.nkassis)\ **Replies:** 2\ **Last updated:** [August 7, 2025, 7:00am UTC](https://psychtoolbox.discourse.group/t/license-management-on-air-gapped-devices/5750 "2025-08-07T07:00:58Z")
3.0.22 - Flavor: Manual Install ———- Windows 11 Hi all, I have a PTB license for multiple devices, one of which is an air-gapped lab PC. The PC has to stay offline for data security reasons. Is there anyway to activate… --- ## [Keystrokes generate short beeps](https://psychtoolbox.discourse.group/t/keystrokes-generate-short-beeps/5728)
**Author:** [@mjwenger](https://psychtoolbox.discourse.group/u/mjwenger)\ **Replies:** 3\ **Last updated:** [July 11, 2025, 6:38pm UTC](https://psychtoolbox.discourse.group/t/keystrokes-generate-short-beeps/5728 "2025-07-11T18:38:45Z")
Hardware and software: Mac OS 15.3.1 (24D70) Mac Mini 2024, Apple M4 chip Matlab 2025a Psychtoolbox 3.0.22.0 Paid license I’ve configured this new Mac Mini as above, and tried to run some scripts that run fine on o… --- ## [PTB-ERROR: IMAGINGPIPE\_FLIPTWHEN variable assignment failed on macOS (works on Windows)](https://psychtoolbox.discourse.group/t/ptb-error-imagingpipe-fliptwhen-variable-assignment-failed-on-macos-works-on-windows/5685)
**Author:** [@ntcog](https://psychtoolbox.discourse.group/u/ntcog)\ **Replies:** 10\ **Last updated:** [April 28, 2025, 3:20pm UTC](https://psychtoolbox.discourse.group/t/ptb-error-imagingpipe-fliptwhen-variable-assignment-failed-on-macos-works-on-windows/5685 "2025-04-28T15:20:26Z")
Hi everyone, I’m encountering an issue when running my experiment code on macOS using Psychtoolbox. The error message is: PTB-ERROR: PsychPipelineProcessMacros: IMAGINGPIPE\_FLIPTWHEN variable assignment failed in runti… --- ## [Psychtoolbox Issue After macOS Sequoia 15.3.1 Update](https://psychtoolbox.discourse.group/t/psychtoolbox-issue-after-macos-sequoia-15-3-1-update/5665)
**Author:** [@dilanazn](https://psychtoolbox.discourse.group/u/dilanazn)\ **Replies:** 4\ **Last updated:** [March 13, 2025, 3:26pm UTC](https://psychtoolbox.discourse.group/t/psychtoolbox-issue-after-macos-sequoia-15-3-1-update/5665 "2025-03-13T15:26:33Z")
Hello Psychtoolbox community, I’m encountering issues with my Psychtoolbox code after updating my macOS to Sequoia 15.3.1. The code, which is quite extensive, was functioning correctly before the update. Now, it’s faili… --- ## [PsychHID and wheel](https://psychtoolbox.discourse.group/t/psychhid-and-wheel/5654)
**Author:** [@keith](https://psychtoolbox.discourse.group/u/keith)\ **Replies:** 8\ **Last updated:** [March 5, 2025, 2:17am UTC](https://psychtoolbox.discourse.group/t/psychhid-and-wheel/5654 "2025-03-05T02:17:52Z")
I’m not sure how my post got hijacked into the other thread. Anyway, GetMouseWheel doesn’t work, it is just zero for the first call and then for the second and subsequent, it returns zero again after a few seconds. But t… --- ## [Problems installing 3.20.1 on M4 Macbook Pro](https://psychtoolbox.discourse.group/t/problems-installing-3-20-1-on-m4-macbook-pro/5621)
**Author:** [@arenart](https://psychtoolbox.discourse.group/u/arenart)\ **Replies:** 3\ **Last updated:** [January 17, 2025, 3:02pm UTC](https://psychtoolbox.discourse.group/t/problems-installing-3-20-1-on-m4-macbook-pro/5621 "2025-01-17T15:02:18Z")
Hi I’m trying to install Psychtoolbox on a Macbook Pro (Nov 2024, Apple M4 Pro, Sequoia 15.1), to be used with Matlab R2024a. I installed first GStreamer 1.24.10 without any apparent issues. I downloaded the Psychtoolbo… --- ## [Using toolbox on macOS for Apple Silicon Macs?](https://psychtoolbox.discourse.group/t/using-toolbox-on-macos-for-apple-silicon-macs/3599)
**Author:** [@hockhs](https://psychtoolbox.discourse.group/u/hockhs)\ **Replies:** 48\ **Last updated:** [January 14, 2025, 12:55am UTC](https://psychtoolbox.discourse.group/t/using-toolbox-on-macos-for-apple-silicon-macs/3599 "2025-01-14T00:55:07Z")
Can the toolbox be used with Big Sur and M1 MacBook and (probably) the latest version of Matlab? Timing is not an issue because I will be designing experiments here and “running” them on other computers. --- ## [Psychtoolbox on Mac Sequoia 15.11](https://psychtoolbox.discourse.group/t/psychtoolbox-on-mac-sequoia-15-11/5572)
**Author:** [@leon.jozzi](https://psychtoolbox.discourse.group/u/leon.jozzi)\ **Replies:** 3\ **Last updated:** [November 26, 2024, 6:58pm UTC](https://psychtoolbox.discourse.group/t/psychtoolbox-on-mac-sequoia-15-11/5572 "2024-11-26T18:58:19Z")
Hello all! I am using Matlab 2021a with Psychtoolbox Version 3.0.19 and, unfortunately, a MacBook Pro running on Sequoia 15.11 (Graphics: AMD Radeon Pro 5300M 4 GB, Intel UHD Graphics 630 1536 MB). I have the Psychtoolb… --- ## [Error Running Psychophysics Experiment Code](https://psychtoolbox.discourse.group/t/error-running-psychophysics-experiment-code/5547)
**Author:** [@rav](https://psychtoolbox.discourse.group/u/rav)\ **Replies:** 1\ **Last updated:** [November 22, 2024, 6:26am UTC](https://psychtoolbox.discourse.group/t/error-running-psychophysics-experiment-code/5547 "2024-11-22T06:26:46Z")
While running a psychophysics experiment code on 3.0.19 Flavor on my M1 MacBook air with macOS Sequoia 15.1, Matlab2024b , I got this error, changed my version of psychtoolbox and matlab but didn’t seem to get any luck… --- ## [Text Bounding Boxes](https://psychtoolbox.discourse.group/t/text-bounding-boxes/5536)
**Author:** [@pscarfe](https://psychtoolbox.discourse.group/u/pscarfe)\ **Replies:** 9\ **Last updated:** [November 18, 2024, 6:56pm UTC](https://psychtoolbox.discourse.group/t/text-bounding-boxes/5536 "2024-11-18T18:56:20Z")
Hi all, I have been playing around with bounding boxes for text, prompted by a recent forum question. I have made a demo drawing the alphabet and the bounding boxes around the letters. I am getting some behavior that I … --- ## [Postdoctoral Research Position](https://psychtoolbox.discourse.group/t/postdoctoral-research-position/5542)
**Author:** [@pscarfe](https://psychtoolbox.discourse.group/u/pscarfe)\ **Replies:** 0\ **Last updated:** [November 11, 2024, 4:13pm UTC](https://psychtoolbox.discourse.group/t/postdoctoral-research-position/5542 "2024-11-11T16:13:46Z")
Have you just graduated with your PhD? Do you have less than 12 months postdoctoral research experience? Do you want to come work in my lab for a year? If you have answered yes to these questions look no further: https:… --- ## [PsychToolBox 3.0.19.14 install issues Apple Silicon MacBook](https://psychtoolbox.discourse.group/t/psychtoolbox-3-0-19-14-install-issues-apple-silicon-macbook/5496)
**Author:** [@tobiasfw](https://psychtoolbox.discourse.group/u/tobiasfw)\ **Replies:** 1\ **Last updated:** [September 18, 2024, 5:07pm UTC](https://psychtoolbox.discourse.group/t/psychtoolbox-3-0-19-14-install-issues-apple-silicon-macbook/5496 "2024-09-18T17:07:28Z")
Hello, I have always used PsychToolbox on a Windows machine. Due to reasons, I have to run it in my MacBook now. I downloaded the version 3.0.19.14 from Releases · Psychtoolbox-3/Psychtoolbox-3 · GitHub to my MacBook an… --- ## [Psychtoolbox on MacOs 14.5 Sonoma, matlab 2024a](https://psychtoolbox.discourse.group/t/psychtoolbox-on-macos-14-5-sonoma-matlab-2024a/5372)
**Author:** [@MTM2024](https://psychtoolbox.discourse.group/u/MTM2024)\ **Replies:** 3\ **Last updated:** [June 6, 2024, 3:55pm UTC](https://psychtoolbox.discourse.group/t/psychtoolbox-on-macos-14-5-sonoma-matlab-2024a/5372 "2024-06-06T15:55:36Z")
Hi, I just tried to setup Psychtoolbox on matlab 2024a on a MacOS 14.5, Sonoma system. But I got this error: “Removing the quarantine flag from our mex files to workaround macOS brokeness failed! Error was: zsh:1: no ma… --- ## [VBL-Synchronization error\_MacOS\_Monterey](https://psychtoolbox.discourse.group/t/vbl-synchronization-error-macos-monterey/5364)
**Author:** [@kkaur](https://psychtoolbox.discourse.group/u/kkaur)\ **Replies:** 7\ **Last updated:** [May 30, 2024, 6:30pm UTC](https://psychtoolbox.discourse.group/t/vbl-synchronization-error-macos-monterey/5364 "2024-05-30T18:30:49Z")
authentication token - VZVZT-Y7-2024527132144:027ed7fc331c79118f50803d69b7c41f2e5a4806fdcee5196fce18149b186a6b Hello all, I am trying to run Psychtoolbox on macOS Monterey, my programming platform is MATLAB\_R2021a. Whil… --- ## [Install error using SetUpPsychToolBox with Mex files](https://psychtoolbox.discourse.group/t/install-error-using-setuppsychtoolbox-with-mex-files/5351)
**Author:** [@inichoson](https://psychtoolbox.discourse.group/u/inichoson)\ **Replies:** 1\ **Last updated:** [May 16, 2024, 6:22pm UTC](https://psychtoolbox.discourse.group/t/install-error-using-setuppsychtoolbox-with-mex-files/5351 "2024-05-16T18:22:30Z")
Hello! I’m trying to run PsychTool Box on macOS Sonoma 14, M1 chip, on Matlab 2023b. I was trying to run video stimuli and getting an error saying that my PsychToolBox had not been installed properly. I deleted, download… --- ## [Does Psychtoolbox work under Mac M3 chip?](https://psychtoolbox.discourse.group/t/does-psychtoolbox-work-under-mac-m3-chip/5210)
**Author:** [@minjaejo](https://psychtoolbox.discourse.group/u/minjaejo)\ **Replies:** 3\ **Last updated:** [May 13, 2024, 4:45pm UTC](https://psychtoolbox.discourse.group/t/does-psychtoolbox-work-under-mac-m3-chip/5210 "2024-05-13T16:45:51Z")
Hi all. I was wondering, if PTB works under mac m3 chip or not. I would like some opinions from who actually tried installing PTB under m3 chip or from the developers. Appreciated for reading. --- ## [MATLAB + Mac Keyboard Recognition](https://psychtoolbox.discourse.group/t/matlab-mac-keyboard-recognition/5158)
**Author:** [@russelldejesus](https://psychtoolbox.discourse.group/u/russelldejesus)\ **Replies:** 14\ **Last updated:** [March 4, 2024, 10:03pm UTC](https://psychtoolbox.discourse.group/t/matlab-mac-keyboard-recognition/5158 "2024-03-04T22:03:15Z")
MacOS Sonoma 14.0 (23A344) + MATLAB R2023b Update 1 (23.2.0.2380103) 64-bit (maci64) My PI and I are designing an experiment on a new desktop Mac that takes over the whole screen. When it gets time for the participant t… --- ## [Configuration of MRI button box to record subject response](https://psychtoolbox.discourse.group/t/configuration-of-mri-button-box-to-record-subject-response/5273)
**Author:** [@Henrike96](https://psychtoolbox.discourse.group/u/Henrike96)\ **Replies:** 3\ **Last updated:** [February 29, 2024, 12:24pm UTC](https://psychtoolbox.discourse.group/t/configuration-of-mri-button-box-to-record-subject-response/5273 "2024-02-29T12:24:56Z")
Dear community, I am trying to record subject responses with a MR compatible Current Designs button box. The software I am using is PTB 3.0.18, MATLAB 2016b, and Windows 10. I am using the KbCheck() function and have t… --- ## [Issues with Psychtoolbox 3 and MATLAB 2019b on macOS 12.4 Monterey - Trigger and Response Box Recognition Problem](https://psychtoolbox.discourse.group/t/issues-with-psychtoolbox-3-and-matlab-2019b-on-macos-12-4-monterey-trigger-and-response-box-recognition-problem/5236)
**Author:** [@pelosegi](https://psychtoolbox.discourse.group/u/pelosegi)\ **Replies:** 2\ **Last updated:** [January 25, 2024, 6:36pm UTC](https://psychtoolbox.discourse.group/t/issues-with-psychtoolbox-3-and-matlab-2019b-on-macos-12-4-monterey-trigger-and-response-box-recognition-problem/5236 "2024-01-25T18:36:59Z")
Problem Description: I have set up an experiment where I need to capture input from a trigger and response box, but the script fails to recognize these inputs. Strangely, other USB inputs are being detected without any i… --- ## [Screen('CloseMovie') freezes inconsistently](https://psychtoolbox.discourse.group/t/screen-closemovie-freezes-inconsistently/5192)
**Author:** [@dgraetz](https://psychtoolbox.discourse.group/u/dgraetz)\ **Replies:** 1\ **Last updated:** [December 1, 2023, 8:08am UTC](https://psychtoolbox.discourse.group/t/screen-closemovie-freezes-inconsistently/5192 "2023-12-01T08:08:36Z")
Hello, This seems to be similar to Silent crash with Screen(CloseMovie) on macOS Catalina - #6 by dcnieho I am running an experiment in which I present videos in some of the trials. The videos are opened, played, and c… --- ## [MacBook M2 Pro : Running Psychtoolbox on it](https://psychtoolbox.discourse.group/t/macbook-m2-pro-running-psychtoolbox-on-it/5184)
**Author:** [@Kudrat](https://psychtoolbox.discourse.group/u/Kudrat)\ **Replies:** 3\ **Last updated:** [November 26, 2023, 4:07pm UTC](https://psychtoolbox.discourse.group/t/macbook-m2-pro-running-psychtoolbox-on-it/5184 "2023-11-26T16:07:00Z")
Hi everyone I’m trying to run a script on MATLAB (the latest version as of 23/11/2023) but im getting the following error: \>\> testt ans = 0 PTB-WARNING: This is a Apple silicon based ARM M1 SoC or later with Ap… --- ## [PSA: Apple Silicon Mac users be afraid of macOS 13.6 or macOS 14](https://psychtoolbox.discourse.group/t/psa-apple-silicon-mac-users-be-afraid-of-macos-13-6-or-macos-14/5156)
**Author:** [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\ **Replies:** 1\ **Last updated:** [November 7, 2023, 8:21pm UTC](https://psychtoolbox.discourse.group/t/psa-apple-silicon-mac-users-be-afraid-of-macos-13-6-or-macos-14/5156 "2023-11-07T20:21:17Z")
Not related to Psychtoolbox, but maybe highly relevant to Apple Silicon fans: You’re welcome. --- ## [Open window can't set to a specified rect size on macOS With Matrox Dualhead2Go](https://psychtoolbox.discourse.group/t/open-window-cant-set-to-a-specified-rect-size-on-macos-with-matrox-dualhead2go/5061)
**Author:** [@zzhou](https://psychtoolbox.discourse.group/u/zzhou)\ **Replies:** 6\ **Last updated:** [October 29, 2023, 7:36pm UTC](https://psychtoolbox.discourse.group/t/open-window-cant-set-to-a-specified-rect-size-on-macos-with-matrox-dualhead2go/5061 "2023-10-29T19:36:38Z")
We are running on macOS. We use a device called dualhead2go from Matrox to connect our video port to 2 external monitors. It creates a stretched desktop across two displays. BlockquoteThe Matrox DualHead2Go Digital SE… --- ## [MacOS 10.11 - totally broken timing for totally expected reasons](https://psychtoolbox.discourse.group/t/macos-10-11-totally-broken-timing-for-totally-expected-reasons/5073)
**Author:** [@zzhou](https://psychtoolbox.discourse.group/u/zzhou)\ **Replies:** 5\ **Last updated:** [October 29, 2023, 7:47pm UTC](https://psychtoolbox.discourse.group/t/macos-10-11-totally-broken-timing-for-totally-expected-reasons/5073 "2023-10-29T19:47:54Z")
Our macOS is 10.11 due to compatibility problems with other software we can’t transition to Linux swiftly. I understand mac has some timing issues, but I want to check if the timing error can be within our tolerance ~2ms… --- ## [KbDemo failure under Big Sur](https://psychtoolbox.discourse.group/t/kbdemo-failure-under-big-sur/3653)
**Author:** [@EyesDude](https://psychtoolbox.discourse.group/u/EyesDude)\ **Replies:** 18\ **Last updated:** [October 26, 2023, 6:02pm UTC](https://psychtoolbox.discourse.group/t/kbdemo-failure-under-big-sur/3653 "2023-10-26T18:02:39Z")
Here’s a new one. Seems to affect some new Macs running Big Sur. KbDemo PTB-WARNING: During PsychHID(‘KbCheck’): Some other running application is preventing me from accessing … (not sure what it says here) PTB-WA… --- ## [32-bit installation error-message on 64bit MacOs Matlab](https://psychtoolbox.discourse.group/t/32-bit-installation-error-message-on-64bit-macos-matlab/5111)
**Author:** [@Scott](https://psychtoolbox.discourse.group/u/Scott)\ **Replies:** 2\ **Last updated:** [September 28, 2023, 12:56am UTC](https://psychtoolbox.discourse.group/t/32-bit-installation-error-message-on-64bit-macos-matlab/5111 "2023-09-28T00:56:32Z")
Hi, I teach a Matlab course in which we use Psychtoolbox. While installing on their personal PCs, 3 of my students who use Mac’s were unable to install (the other Mac-users were fine). “Psychtoolbox 3.0.12 and later d… [Next page](https://psychtoolbox.discourse.group/tag/macos/13.md?match_all_tags=true&page=1&tags%5B%5D=macos)