Looking for an application that can display many files at once of varying file types. Ideally there'd be a stellar grid view of previews so users could quickly scan through them - flagging a few or reorganizing them as necessary. A few example file types, PDF, PNG, CAD, AI, PSD - the closer to "universal" the better. Not sure if there would be proprietary limitations for Adobe and others. Ideally, this would also be local software so the files don't need to be transferred. OSX and Windows compatibility preferred. Thanks for taking the time.
IrfanView covers some of these but not all (https://www.irfanview.com/main_formats.htm) https://www.irfanview.com/screenshot/big/28_menu_thumbs_view.jpg and is PC only.
Perhaps the app called "Preview" on the Mac.
Adobe Bridge does Adobe-related ones quite well which aren't covered by others.