Prototype release for MacOS 12 (Monterey) and M1 Processors
I've received many requests for a version of VidSync that works with the latest MacOS, including the fantastic new M1 processors. Creating this update required fixing lots of code from the old version that was no longer compatible with the latest MacOS. I was able to get all the important things working, but there are still a few minor glitches, and one minor feature isn't functioning (portraits). I'm not sure when I'll have time to fix them, so I'm putting out this imperfect version that will still work well for 99 % of applications.
To be clear, this version should work in MacOS Monterey (and probably later, when new versions come out) and it will work on both Intel and M1 Macs.
Newest version: VidSync 1.72
Latest stable (but outdated) release of VidSync
This version requires OS X 10.9 (Mavericks) or later. It has only been tested in 10.11 (El Capitan) or later, but it should theoretically be compatible with 10.9 and 10.10. It has also been tested with later versions up through 10.15 (Catalina), but it stopped working at some point after that due to some breaking changes Apple made in the operating system.
Older, complete version: VidSync 1.661.zip
VidSync used to come in a normal "installer package" you could run to automatically place the program in your Applications folder, but Apple has taken that option off the table for now. So the current version comes as a zip file containing the application. Just unzip and move it into your Applications folder manually. You might need to right-click the application and click "open" rather than trying to open it by double-clicking, in order to get to a screen that allows you to approve opening the program.
You can also browse the source code for VidSync on Github, or modify it to create your own version of the program. To modify VidSync in Apple's XCode development environment, go to "Check Out..." under the "Source Control" menu and check out the repository at
Old versions of VidSync
The early 2015 version experiences some latest glitches in OS X 10.11 (El Capitan). They're fixed in the newer version (1.60), which also includes several minor feature improvements and bug fixes.
The installer package should work fine for a fresh install. Sometimes, if you had multiple previous versions of VidSync on your system, it fails to overwrite the correct one, and when you open it from your Applications menu you'll still see the old version. If that happens, download this zipped version and manually unzip it into your Applications folder to make sure you get the new version.
This legacy version is compatible with earlier versions of OS X, from 10.6 (Snow Leopard) and on. It uses the same well-tested mathematical techniques as the current version, but it is less stable and there are several glitches. I highly recommend using a more recent version unless you are using old, 32-bit Mac hardware that cannot run the free upgrade to OS X 10.9 / Mavericks.