This Mac workflow will resize images to a width of 1080px and then add them to your Photo Library. It uses a slightly modified Applescript shared by Craig Smith on Stack Overflow.
The workflow accepts image files for input.
- It takes those image files and copies them to a folder on the Desktop it creates called Instagram.
- It will then look for the string "FS" in the images' filenames.
- If it finds "FS", it will change it to "IG". Otherwise, the file will retain its name.
- It then uses Sips to resize the images to 1080px while maintaing the images' proportions.
- It will then add the images to your Photo Library (Photos.app).
You may wish to disable or alter Steps 2 and 4 depending on your workflow.
- Open the .workflow file in Automator.
- Save it as a service ~/Library/Services
- In Finder, highlight the photos you wish to resize.
- Right-click on one of the photos and in the menu, go to Services, then Create Photos for IG v2.