CMMTHEME file format description

Many people share .cmmtheme files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cmmtheme file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cmmtheme files.

1 filename extension(s) found in our database.

.cmmtheme - CleanMyMac Theme Data

The CMMTHEME data files are related to CleanMyMac. The CMMTHEME file is a CleanMyMac Theme Data. CleanMyMac is a Mac cleaner, speed booster, and health guard application.

Data files
- / -
CleanMyMac Theme Data related extensions:
BibExcel Journal Data
Power To-Do List Data
WildTangent Mesh Data
DXF-TIIP Pattern Data
Claris Organizer Data
XPSWMM Hydrology Data

Naturally, other applications may also use the .cmmtheme file extension. Even harmful programs can create .cmmtheme files. Be especially cautious with .cmmtheme files coming from an unknown source!

Can't open a .cmmtheme file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .cmmtheme file format, then write to us! >> CMMTHEME file