Lightroom Publishing to Instagram No Longer Works

How to upload photos to Instagram from a desktop browser

Most browsers have a way of letting you change the "User Agent" -- the thing that tells a website what kind of device you're on. So, even when you're on a laptop or desktop, you can trick a website like Instagram into showing you the mobile site. That's what we're going to do.

Safari

On Safari, it's easy. Go to Safari > Preferences > Advanced. Check the box at the very bottom that says, "Show Develop menu in menu bar."

Now open a private browsing window. Head to Develop > User Agent > Safari -- iOS 10 -- iPhone. Go to Instagram.com, sign in and click the camera button at the bottom of the screen to upload a photo from your desktop.

Chrome

In Chrome, go to Instagram.com and sign in. Now right-click the page > Inspect > click the Tablet icon (top-left). The page should switch to mobile view, where you'll find a camera button at the bottom of the screen, which lets you upload a photo from your desktop.

From CNET