How to open .ICNS file extension?

If you cannot open a new file that has been saved in the .ICNS format you need to download the appropriate software. The manufacturer of .ICNS files is Apple; .ICNS files belong to the System Files category. After downloading the application from the list available on our website just run an unknown file, and as the default set the newly installed application supporting the .ICNS files. Activities performed in the order described should solve the problems with all the files in the .ICNS format.