
Sharpen a photo in Photos on Mac
The Sharpen adjustment changes photos by making edges crisper and better defined.
Note: You can also sharpen a video using the Sharpen controls. See Change and enhance a video.
- In the Photos app  on your Mac, double-click a photo, then click Edit in the toolbar. on your Mac, double-click a photo, then click Edit in the toolbar.
- Click Adjust in the toolbar. 
- In the Adjust pane, click the arrow  next to Sharpen. next to Sharpen.
- Drag the sliders to adjust the sharpness.  - Intensity: Adjusts the strength of the sharpened edges. 
- Edges: Sets the threshold for which groups of pixels are edges and which ones aren’t. 
- Falloff: Makes the sharpening effect look more or less prominent. Increasing the falloff value makes the sharpening more severe; decreasing it softens the effect. 
 
Tip: Position the pointer over a slider and press and hold the Option key to extend the slider’s range of values.