How do I open .cache files?

Welcome To  Discussions Chris!

They will be very difficult to decipher, but you may be able to harvest some info, this way.

Quit the browsers.
Move the Cache files you wish to view to a folder on the Desktop.
Do a Get Info Command + I keys, on a Cache file you wish to view.
In the Open with: ▼Contextual menu, select Other.
Navigate to TextEdit, and click once on it, to highlight.
Click Add.
DO NOT select Change All!

Now double-click on the Cache file, and see what you get.

Another option, may be to view the browser's History.plist, in the same manner.

ali b

Hi, wafffenmg34. This should probably go without saying, but cache files that you find in Users>accountname>Library>Caches>Safari were not created using FireFox; they were created using Safari. If FireFox and/or any other web browser is also installed on the computer, you'll want to look for cache files in the appropriate folders for the other browsers, as well as in Safari's folder.

If anything you may find in those files might ever be used in a court of law, check with your attorney about the advisability of moving, examining and, most of all, modifying the files in any way, before you do anything at all with or to them. It would be so easy for you to alter their contents with the intent of making your wife look bad that I wonder how useful or admissible they would ever be as evidence, especially if you could be shown to have had ready access to them — and to have used it — after she left the scene.

If all you want to do is read them, and you have no plans beyond that, then be sure to read copies of them, not the original files. That will preserve the originals in untouched condition.

Most should be text files so you should be able to read them in TextEdit.