April 12, 2015
I have updated Gimp 2.9 series to the git pull from today, April 12, 2015. The portable version has been updated as well. I think it has come a long way and I find it to be much faster than previous versions that I have packaged.
For the 2.8 series, I updated all the bugfixes as of April 12.
G'MIC has been updated to the latest stable verion 22.214.171.124 in both builds. I have found G'MIC to be relatively faster in the 2.8 series than 2.9. In both cases, you can only operate on 8-bit images with G'MIC. You can use native GEGL plugins with 8/16/32 bit images.
Important: Uninstall previous builds from the target installation location. Installation has been streamlined as much as possible.
An installer has been provided for both the 2.9 and the 2.8 series. Download and double-click on the installer and follow the instructions on your screen. The portable version is a self-extracting 7z archive. Double-click and extract to a location where you have write privileges.
Make sure your registry is cleansed of all references to Gimp and then use Windows to associate this version of Gimp with your desired image formats.
Mac OS X
Installation on the Mac is straightforward. Unzip and drag the app to your personal or system Applications folder. The OS will do the rest. :) This version is compatible with all OSX versions from Snow Leopard onward.
All feedback and comments are welcome. We appreciate your support and hope you keep using Gimp. If you encounter any issues, please let us know. One important point: If you expect a response, leave a valid email address.
If you are inclined to leave us feedback or a comment, then please send an email to partha at partha dot com. You can also contact us on Google+ or Flickr. Please be precise about the software and what kind of help you require.