# OSX **URL:** \ **Category:** Uncategorized\ **Created:** [January 31, 2002, 12:27am UTC](https://psychtoolbox.discourse.group/t/osx/1253 "2002-01-31T00:27:34Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\ **Post date:** [January 31, 2002, 12:27am UTC](https://psychtoolbox.discourse.group/t/osx/1253/1 "2002-01-31T00:27:34Z")
Has anyone out there been using matlab and the Psychophysics toolbox in the classic window of OSX? Any problems? Any comments? Any issues? I haven't used OSX yet mostly because of worries about matlab. thanks, Geoff Loftus Geoffrey R. Loftus, PhD Office: (206) 543-8874 Department of Psychology Home: (206) 547-6969 Guthrie Hall, Room 131 Mobile: (206) 605-1974 University of Washington Fax: (206) 685-3157 Box 351525 Web: [http://faculty.washington.edu/gloftus](http://faculty.washington.edu/gloftus) Seattle, WA 98195-1525 ---
**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\ **Post date:** [January 31, 2002, 4:25pm UTC](https://psychtoolbox.discourse.group/t/osx/1253/2 "2002-01-31T16:25:58Z")
Geoff Loftus wrote: > \> Has anyone out there been using matlab and the Psychophysics toolbox in the > \> classic window of OSX? Any problems? Any comments? Any issues? I haven't used > \> OSX yet mostly because of worries about matlab. Geoff, To answer your question I tried many of the demos included with the Psychtoolbox in the OS 9 emulation window under OS 10.1.2 on a PowerBook G4. I found that the demos which depend on precise timing do not work reliably. Movie playback is glitchy, for example SaccadeDemo.m and MovieDemo2.m have prominent artifacts. I did not discover any problems other than timing. Best, Allen ---
**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\ **Post date:** [January 31, 2002, 5:01pm UTC](https://psychtoolbox.discourse.group/t/osx/1253/3 "2002-01-31T17:01:06Z")
Geoff, I am following up on my previous message with a few more comments on the subject of the Psychtoolbox and OS 9 emulation under OS X. Because the timing is not reliable, I recommend sticking with the genuine OS 9 when using the Psychtoolbox, and not using the emulated OS 9 for the Psychtoolbox unless you are only displaying static images for long durations and you do not care about synchronizing their onset and offset with the vertical blank. That you want to use the Psychtoolbox should not prevent you from installing OS X. Both OS 9 and OS X can be installed on the same Mac and you can choose which to boot each time you restart your computer. (Use the startup disk control panel). Having to restart your computer is inconvenient. I am interested in producing an OS X native version of the Psychtoolbox, but doing that would depend on the Mathworks releasing a version of MATLAB for OS X, unless we decide to switch away from MATLAB to something similar. Allen "Allen W. Ingling" wrote: > \> Geoff Loftus wrote: > \> > \> \> Has anyone out there been using matlab and the Psychophysics toolbox in the > \> \> classic window of OSX? Any problems? Any comments? Any issues? I haven't used > \> \> OSX yet mostly because of worries about matlab. > \> > \> Geoff, > \> > \> To answer your question I tried many of the demos included with the Psychtoolbox > \> in the OS 9 emulation window under OS 10.1.2 on a PowerBook G4. > \> > \> I found that the demos which depend on precise timing do not work reliably. > \> Movie playback is glitchy, for example SaccadeDemo.m and MovieDemo2.m have > \> prominent artifacts. I did not discover any problems other than timing. > \> > \> Best, > \> > \> Allen > \> > \> > \> [http://psychtoolbox.org](http://psychtoolbox.org) > \> POST a message to: [psychtoolbox@yahoogroups.com](mailto:psychtoolbox@yahoogroups.com) > \> UNSUBSCRIBE by sending a blank message to: > \> [psychtoolbox-unsubscribe@yahoogroups.com](mailto:psychtoolbox-unsubscribe@yahoogroups.com) > \> > \> Your use of Yahoo! Groups is subject to [http://docs.yahoo.com/info/terms/](http://docs.yahoo.com/info/terms/)