Hi JA_718,
Since the MG5320 is not compatible with the Mojave operating system, you can try installing the High Sierra drivers as a work around.
Please note that the software for the High Sierra operating system may or may not function in the newer Mojave environment. If it does work, there may be some limitations which are unknown to Canon. If the older software does not work, there is little more that you can do.
Please click HERE to go directly to the download site for your MG5320. Once you are on the website, please change the operating system from Mojave to High Sierra.
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