It goes and looks at it and says yah, okay it's an image. But when I go to open it up it still opens it up. Now here it will complain about changing the file format or the extension. I can even go and try to fool it and say it's not a jpg image, it's a tif which is an older image format. I can change to something like xxx and it doesn't really care about that. I can, for instance, take away the extension completely and it's find with that.
File extension for video on mac mac os#
You can even try to fool Mac OS and it won't work. So you can just take the e out and you're fine. Maybe you have an old jpg image that has an e. The only reason you would want to change the name is because sometimes different services or websites ask you submit something and they want it submitted as jpg and they won't accept say the format with the e in it. I double click on it and it opens up in Preview as before. As a matter of fact Mac OS doesn't even complain when you switch between those two because it knows they're the same thing. Somebody would ask how do you convert from jpg from jpeg. The extension is just a little convenience. So it knows this from inside the image what type it is. I can do Command I in Preview and it shows Document Type, jpg image. jpg I can double click and it will open up in Preview and knows it's a jpg file. You can go back and forth between either one of those. Which one is correct? Well both are fine. That's Off here meaning it's going to show that extension for this file no matter what I have set in Preferences. As a matter of fact if you select a file, do Command I to get info on it, you'll see a Hide Extension checkbox. I've used them when I've renamed or saved a file and Mac OS is smart enough to know to display them. You see these here, despite the fact that I have that turned off, because I've used those filename extensions.
If you don't see them here you can go to Finder, Preferences and under Advanced you can check Show all Filename extensions. File extensions are the letters, usually about three or four letters, after the dot or period in the filename.
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Video Transcript: Hi, this is Gary with. Check out Understanding Mac File Extensions at YouTube for closed captioning and more options.
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