How to open .INPROGRESS file extension?

If you cannot open a new file that has been saved in the .INPROGRESS format you need to download the appropriate software. The manufacturer of .INPROGRESS files is Apple; .INPROGRESS files belong to the Backup 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 .INPROGRESS files. Activities performed in the order described should solve the problems with all the files in the .INPROGRESS format.

• What is .INPROGRESS file?
• How to open .INPROGRESS file?
• What is .INPROGRESS file?