KMZ is a format used to display geographic data in Google Earth, Google Maps and other similar tools. When you visualize the data, it may be possible to export the visualization as JPEG picture (.jpg, .jpeg) and this looks like the pretty much only kmz to jpeg conversion that makes sense.
Convert Compressed Keyhole Markup Language (Google Earth) data to JPEG bitmap image format.
We have found one software suitable in our database for this conversion.
Apple macOS / Mac OS X software - convert kmz to jpeg on OS X
3D modeling application for Mac
Convert from kmz file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.