Igor Pro 8 Frequently Asked Questions

This page covers common questions about Igor Pro 8. The material below may not yet be incorporated into the help files that come with Igor Pro.


Why is the Macintosh version of Igor Pro 8 64-bit only? Will there be a 32-bit version?

Apple has announced that High Sierra (macOS 10.13) will be the "last macOS release to support 32-bit apps without compromise". Because of this, and the fact that the vast majority of our Igor Pro 7 Macintosh users are already using the 64-bit Igor application, we have dropped the 32-bit Macintosh application for Igor Pro 8. Unless you are using a 32-bit only XOP on Macintosh this change should not affect you.

On Windows, the Igor Pro 8 installer installs both 32-bit and 64-bit applications.


On Macintosh, using OS X 10.11, I sometimes get many blank windows (windows with only a title bar but no content). These windows don't behave properly. What is the problem?

We don't know for sure what causes this but this problem is specific to OS X 10.11 (and possibly 10.10). Typically this happens when you switch from Igor to another application (either by hiding Igor using Cmd+H or by clicking on the desktop or the Dock icon for another application). We know that having had the Igor Debugger visible can result in this behavior, but we aren't certain that the Debugger is required. Sometimes Igor also crashes after being in this state, so if you get into this state it is best to save your experiment and restart Igor.

The only certain workaround we know for this problem is to upgrade your OS to macOS 10.12 (Sierra) or later.


Obsolete Questions

These questions are no longer relevant. If you observe the behavior described, you should update to the latest release.