If the problem with the X3F file has not been solved, it may be due to the fact that in this case there is also another rare problem with the X3F file.
If you are sure that all of these reasons do not exist in your case (or have already been eliminated), the X3F file should operate with your programs without any problem. I have and don't plan to leave photoshop CS6. Further, can't find any evidence of acr 8.8 being installed, only the dng converter which makes everything take twice as long.
#Adobe dng converter x3f drivers
Drivers of equipment used by the computer to open a X3F file are out of date. Just got a Nikon d5500 so downloaded adobe camera raw 8.8 (dngconverter88.dmg) and supposedly installed it, but the old 8.3 is the only thing showing up in the file menu.The computer does not have enough hardware resources to cope with the opening of the X3F file.The X3F file which is being opened is infected with an undesirable malware.Incomplete installation of an application that supports the X3F format.Accidental deletion of the description of the X3F from the Windows registry X3F files SIGMA Photo Pro EZ Freeware Free Opener Corel AfterShot Pro 3 Graphics Adobe DNG Converter Graphics CyberLink Media Suite.Incorrect links to the X3F file in registry entries.Corruption of a X3F file which is being opened.There may be other problems that also block our ability to operate the Sigma Camera RAW Picture Format file. The inability to open and operate the X3F file does not necessarily mean that you do not have an appropriate software installed on your computer.
DNG is supported by the following software: Photoshop. Software developers and manufacturers can download the complete DNG Specification - PDF. Possible problems with the X3F format files In addition to the Digital Negative Specification, Adobe provides the free Adobe DNG Converter - Windows macOS, which easily translates raw files from many of todays popular cameras.