Images reducing from hi-res to lo-res when I try to share?
Trying to share hi-res photos from Apple Photos, but they reduce in size when I attach them to an email file, drag to desktop or share via OneDrive... help?
Question marked as
Which system version is installed on your Mac? And what is the file format of the photos? JPEGs, RAW files, HEIC images?
How are you trying to share the photos?
When you simply drag a photo from Photos to the Desktop, you will save the current preview of the photo. The preview can be a file of a lower resolution. To save a file with the full resolution for sharing, select the photo or photos in Photos and use the command "File > Export > Export ... photos". Set the Photo Kind to the file format you want and select the original size. Only the Export command is allowing you the full control over the quality.
When you use "Share > Mail" to share selected photos and Mail opens with a New Mail window, set the "Image Size" selector to "Actual Size" to share a JPEG of the highest possible pixel size.