If you can’t find a file:
Choose Window > Downloads.
In the Downloads window, click the magnifying glass next to the filenames to see where the files are located on your computer.
If you download a disk image file, Safari shows the name of the disk image volume in the Downloads window. If you have unmounted the volume, when you click the magnifying glass Safari shows the disk image file in the Finder.
If you download an Internet Disk Image, Safari decompresses the file and copies its contents to the download location, then moves the disk image to the Trash. If you click the magnifying glass, you will see the contents of the download location. If you want to save the disk image file, drag it out of the Trash.