MPEG is one of the most popular video formats on the internet, but you can't put it to iPhone directly. And many friends are still looking for the best solution to play mpeg files on iPhone. Now I recommand you the MPEG to iPhone Converter for Mac, which is now the moat popular way to convert mpeg to the formats supported by iPhone. Besides, it can convert mpeg to many other formats.
Screenshot:

Detailed introduction of how to operate the program:
Launch and run the sofrware. Click the
to select the mpeg files you want to convert to the file list.

Choose one or more files in the file list, then open the Profile drop-down list to select an iPhone fromat as the output format for selected files.

Click the
button which you can find in setting panel, then select an output folder in the dialog box that opens, and click OK.
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Check the files you want to convert in the file list, and click "Convert" button on the toolbar to start converting the files.
The conversion progress can be viewed from the progress bar at the bottom of the interface.

Tips:
a: You can adjust the output settings by clicking
button next to Profile drop-down list to set the parameters of output format.
b: The "Edit" button on the toolbar can help you personalize your files too.
After our guide, did you find it so easy to operate the MPEG to iPhone Converter for Mac? You can use the converter to convert mpeg to many other formats. Try more!