Oct 25, 2009 - You can make Mac OS X open every file of a certain format type with a. Command for email on mac. 2 Ways to Change the Default Application to Open Files With in Mac.

It’s happened to all of us: A colleague sends an image that you’d like to edit, but when you double-click on it, Preview launches instead of Adobe Photoshop. Or, you save a text-only document from Microsoft Word and when you later open it from the Finder, it launches TextEdit instead. Before OS X 10.6 (Snow Leopard), when you double-clicked on a file it would always open in the application that created it. Now, native documents (that is,.doc or.docx files for Word,.indd files for Adobe InDesign, and so on) still open in their parent applications, but common file types—for instance,.txt,.jpg, and.html—open in more generalized applications, such as Apple’s TextEdit, Preview, or Safari. Whether or not you like Snow Leopard’s new approach, you can always control which application opens a file.

The Open With command and its variations let you temporarily override, or completely reassign, where your documents open—as long as you choose an application that knows how to interpret the document’s information. And, if you’re working in OS X 10.5 (Leopard), where a double-clicked file always looks for its creator instead of a pinch-hitter, these commands are still very useful when you want to open documents with something other than their parent applications. Open With: Just this document, just this time A friend has e-mailed a rough draft of a document created in TextEdit and saved in Rich Text (.rtf) format. You want to edit it in Microsoft Word. Sure, you can use Word’s Open command (as long as you set the Enable pop-up menu in its Open dialog box to All Readable Documents), but Word isn’t running yet, and you’re looking at the document’s icon in your Downloads folder. Just select the icon, choose File -> Open With, and select Microsoft Word from the submenu.

Or, Control-click (right-click) on the file’s icon and choose Open With -> Microsoft Word from the contextual menu. This time the file will open in Word. The next time you double-click on it, it will revert to opening in TextEdit. Photo storage solutions for machines.

You can control what application your file opens in, even when the file is an e-mail attachment. In Mail, Control-click on the attachment's icon to see a contextual menu.The time-honored tradition of a “force open” still works, too: dragging a document onto an application’s icon in the Dock or in the Applications folder has the same result as using the Open With command. Tip You don’t have to save an e-mail attachment first to open it in something other than its default application. If you’re using Apple’s Mail, you can Control-click (right-click) on the attachment’s icon in the message window to see a contextual menu that includes the Open With command. Always Open With: Just this document, from now on Snow Leopard opens JPEG images in Preview. You may find this a perfectly good solution most of the time if all you want to do is flip or rotate the image, or perhaps save it in a different format such as TIF or PNG. But in this case, you want to open the JPEG in Photoshop for more advanced alterations and you know you’ll be editing the image repeatedly.