You have to download the software from Sony online.
Sony provides both Mac and Windows software.
I installed the software for Windows 10. Sony provided these:
"Edit" lets you import, convert RAW and adjust image files.
"Remote" lets you control the camera from your PC.
Capture One (provided by another company) is also available and is said to be very good, but I have not installed that yet. (Apparently, the express version of Capture One is free, but the pro version is not.)