How to Resize an Image (for Mac)

Using Preview

1. Double click to open your image – it should automatically open up in Preview
2. Click on Tools > Adjust Size…
3. You can change the image dimension to resize the image
4. Click cmd + S to save your image

Using Photoshop

1. Open Photoshop 
2. Click File > Open to open your image in Photoshop
3. Click Image > Image Size…
4. Adjust Width and Height to resize your image
5. Click OK
6. Click cmd + S to save your image