Microsoft PowerPoint allows users to export their slideshows and presentations as images. Such pptm to jpg conversion can be done with the File ► Save as.. function, where you select JPEG format as output and then pick if you want to save only current slide or all slides as images.
You may also probably find other presentation programs that may support the very same thing for PowerPoint formats. Dedicated file converters can perhaps be also of help.Open PPTM file Open JPG file
A presentation graphics application from Corel WordPerfect Office
A presentation program from the Microsoft Office suite
Mac version of popular presentation software from Microsoft