While the interface could use some more detail, XnConvert for Mac makes it easy to change the attributes on one image or multiple images. In addition, the program allows for files to be matched in terms of orientation, size, and other attributes.
Upon startup, the program's initial menu is where users can click and drag files for modification. This immediately lists several criteria for the individual files, including creation date, size, and properties. Files and entire folders can also be manually loaded, which is a good feature for those wanting to modify batches of images. The second menu allows the user to select the modifications, which has dozens of important options. These are subdivided by categories, which cover filters, size, and orientation. While comprehensive, most options are difficult to interpret by their names, but a preview window will help users select appropriate choices. The output menu also allows for easy selection of file locations and additional options, such as preserving photo metadata. XnConvert for Mac responds well overall and the batch processing completes quickly, with all of the selected changes included in the output.
For those users who want a program to modify a number of photo attributes in groups, XnConvert for Mac is a useful option, despite its rather complicated interface and lack of instructions.