Uplet

Uplet is used to upload a single or multiple photo post to your Instagram account on the Mac. You can do square size processing, add captions (subtitles and Emoji). The software works well. After startup, drag and drop photos (one or more) to the Uplet window to upload.

Main features:
*Batch photo uploads directly from your Mac
*Upload high-resolution photos
*Emoticon support
*Square or original size is up to you

Uplet allows you to upload photos taken with any device you have (even if you don't have your iPhone right now). The number of photos you want to publish doesn't matter. Just click on the Mac to do it all at once.