This probalby works for some people, but not me. It appears to do something, but then fails to save the photos.

This is a very useful app. It’s very simple and quickly does just what I need. There is a quirk that could make you think it’s “doing nothing”, due to the Mac App Store rules about where apps can create output. The manual mentions this, but it’s possible to miss that. I started with it long ago, in the pre-App-Store version, which could save the output files to any destination, and would default to an Untitled folder within the original folder. However, since the MAS sandboxes apps into writing output only into designated folders like Pictures, this version of ResizeIt insists on putting the resized photos in that location. If you try to choose another destination, it does not save output to that location. The developer’s site has a non-App-Store version (3.8.0 now) which can save to any location as before.

I don’t know why this is getting such bad reviews, but maybe it’s improved greatly just recently (I’m writing this on Dec 1, 2018) and the old reviews are weighing down the rating. I love this little app — it’s the easiest, fastest way I’ve found to reduce the size of images. Works fine every time. Most of the photos I get off my iPhone are too large to send easily on email (usually I’m sending more than one) and this takes them down in a jiffy. So happy to have found it and will be giving a demo to our Mac club soon.

I used to utilize this when processing pictures from my phone which usually come out around 3mb each. It worked flawlessly but I didn't have a need for it again until recently. Now it appears to allow you to select the files, set the transfomations and select the output folder, and then it does nothing. Output folder remains empty. Please update and fix, this app is invaluable to us in our daily processes. Its a small simple app but doesn't seem to want to work at all on OS 10.7.5. Is there a way to download the old version in the meantime? Hope so...