How do you invert a black and white photo image on a Mac?

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How do you invert a black and white photo image on a Mac?

In this earlier Post (from 2015)...

How do you invert a black and white photo image on a Mac?

...the answer required the person to have Aperture, but the basic methodology suggested also works with Preview! This method is slightly different than the method they suggested. Instead you use the Toolbox tool of the Preview app, then adjust the "Black" slider and the "White" slider as shown in the images below:

MacBook Pro, OS X El Capitan (10.11.3), The Apple Preview App

Posted on Apr 25, 2018 10:29 PM

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léonie

Level 10

194,691 points

Apr 26, 2018 3:16 AM in response to StrugglEEng

That is a nice discovery. Preview is getting more and more powerful as an image editor.

Since your post is in the Photos forum - you can also use the Curves adjustment in Photos to turn a photo into a negative. You just have to invert the RGB curve. Raise the curve for the 0 value to 255 and lower it for the 255 value to 0.

Before:

After:

To make the negative Black&White, click the Black&White adjustment.

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How do you invert a black and white photo image on a Mac?

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