Mimeo Photos supports all image formats which Apple Photos supports. This includes JPG, TIFF, PNG, and most RAW formats. 

There are some newer RAW formats, such as CR3 (Canon’s new RAW format) which are not widely supported yet. 

For these formats, we recommend converting the unsupported format to DNG RAW. You can accomplish this by using a tool such as Adobe's DNG Converter.

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