Using the Photos app:
- Select the photos you need to Export.
- Then go to File > Export (numer of photos selected) Photos… > Then you will have the following options:
Photo Kind: JPEG
JPEG Quality: High
Color profile: Original
Size: Full Size
- In the Size drop down menu select Custom > Max: Dimension > of: 1024 px
- Click Export and Select the Destination Folder (you can create a folder on the Desktop called ‘Exported Photos’ or any other name that you prefer).