September 20, 2015
The portable version has been fixed and updated to the current GIMP git version pulled yesterday. McGimp 2.9 has been updated with the G'MIC version compatible with GIMP 2.9. Enjoy!
September 16, 2015
The Windows GIMP 2.9 portable is currently broken. Please use the regular version while I fix it. Thanks for your patience.
September 13, 2015
Great NEWS! David has updated G'MIC to work natively with the GIMP 2.9 series. Now you can apply all the filters provided by G'MIC for high-bit depth editing. You can read all about it here. I have also updated the GIMP 2.9 series to the git pull from today.
This build is also the beginning of introducing serious color management and color profiles. Given that GIMP is making it easier to manipulate images even in 32-bit float, it is crucial to get your colors right. You can explore color management at Elle Stone's site Nine Degrees Below. She has kindly consented to provide two ICC profiles, which are included with the distribution.
I have not had the time to update the Mac version. I will do so in the coming days.
Important: Uninstall previous builds from the target installation location. Installation has been streamlined as much as possible.
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.
Remove all references to GIMP from the registry and then use Windows to associate this version of GIMP with your desired image formats.
Mac OS X
Download the zipped App and unzip it in your Application Folder.
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.