No longer. Since the release of version 5.4, the minimum Operating System requirement for OmniGraffle is Mac OS X 10.6.8, which requires an Intel processor in order to run.

An earlier version of OmniGraffle 5 that run on OS X 10.5 can be found here

OmniGraffle 5 Professional now imports Visio’s proprietary binary file format (VSD) as well as importing and exporting Visio’s XML document format, VDX. This is a pro-only feature, so the Standard version of OmniGraffle does not support import or export of Visio documents.

To resolve your issue, you will need to delete the Help Viewer Preferences files (com.apple.[help,helpui,helpviewer].plist) from ~/Library/Preferences/ (where ~ is your home directory). This will reset Help Viewer and allow you to use OmniGraffle Help properly again. You may also wish to do the same to the Help Viewer cache (located at ~/Library/Caches/).

OmniGraffle 5 is a paid upgrade for users of OmniGraffle 2, 3 & 4. You can find out upgrade fee information at the Omni Store. You can download the latest versions using the following links:

• OmniGraffle 4 here
• OmniGraffle 3 here
• OmniGraffle 2 here

While nothing is impossible (with the possible exception of traveling faster than the speed of light), a Windows or Linux version of OmniGraffle would be highly improbable, as there’s simply too much “under the hood” in OmniGraffle that’s tied directly to the Cocoa API available only in Mac OS X.

The bestest, most easiest way to get your foot on the inside of OmniGraffle development is to sign up for our User List. Announcements, discussion, answers and generic banter may be found within the many threads of the User Mailing List, weaving itself into a tapestry of OmniGraffle goodness. Keep an eye peeled on our blog as well, beta releases get announced there quite frequently.

Double-check to make sure that Automatic Layout isn’t turned on in the Diagram Layout Inspector. Some templates have this setting turned on by default to make the creation of properly laid out diagrams using the Outline Editor much easier.

Like most Mac OS X applications, our products can be uninstalled by simply dragging the icon to the trash. Once you empty the trash, the application is gone from your computer. Like Jeff Goldblum says, “There is no step three!”.

Just visit the Lost Licenses page to retrieve it. If this does not work for you, please send an email to sales@omnigroup.com.

If you purchased your license through our online store:
Both the license key and license owner must be entered exactly as it was emailed to you. The key is linked to the owner so they both must match exactly to be accepted by the application. The license key should be a 23-character long string and does not contain numbers. If you need your license key sent to you again, you can use the Lost Licenses page to retrieve it. If you are still having trouble, please send an email to sales@omnigroup.com.

If you purchased a retail boxed copy:
Please double check you entered the license key exactly as given to you. The license key should be a 23-character long string in the format of XXXX-XXXX-XXXX-XXXX-XXXX-XXX and does not contain numbers. If you are still having trouble, please send an email to sales@omnigroup.com. It is also recommended you register your license key with us so we can send it to you if you happen to misplace it.

One of the advantages of the Mac App Store is that the products you buy there don’t require license codes. Instead, your iTunes account information is used to unlock the products you buy there.

If your Omni application is asking for a license code, it’s usually because a trial copy of the application downloaded from our website is being run instead of the Mac App Store edition.

The easiest thing to do in this case is a Spotlight search of the entire Mac for the product name. Use the results to find and launch each copy of the app on your Mac one by one. If a copy asks for a license, quit it, then move it to the Trash. Copies installed via the Mac App Store won’t do this.

If, at the end of this process, all the copies are in the Trash, you can use the “Purchases” tab in the Mac App Store to download a new copy of the product. Once the Mac App Store edition is installed, you won’t be asked for the license info on launch.