What size screenshots should be used for IAPs ( In app purchases ) for Mac apps?
What dimensions should be used for IAP screenshots for Mac apps on iTunesconnect?
I have tried uploading PNG screenshots with:
2560 x 1600 px
640 x 920 px
to no avail... but the upload does not seem to be accepted... Can anyone advise which dimensions will be accepted? Apple specifies 640 x 920 but it does not upload and there is no error message.
Answer
I would like to add to the accepted answer because regurgitating the documentation does little to resolve actual problems.
After taking a screen shot of the app on my device for in app purchase review and it still didn't work, I did some investigating.
After you attempt to upload a screen shot and see the error to upload a valid size, you can open the browser inspector to see the error details. The image MUST be one of these dimensions: accepted resolutions found in console error
Something else I didn't realize is when taking screen shots with command-shift-4 on macbooks, when you hold it down for the drag you can see the actual dimensions of the screen shot you are taking, but for some reason it saves it as DOUBLE the size. I ended up taking a screen shot where the cross hairs of the screen shot say 320 x 480 resulting in a saved png of 640x960. It has to be one of the pre set sizes in order for image upload to accept it.
After banging my head on a wall for a couple hours I figured this out, so I hope this helps others .