As many of users are aware now, Apple devices iOS’s has supported photo uploads for several versions now.
In the file listed below you will see the direct path to find the script which needs to be edited.
application/modules/Core/layouts/scripts/default.tpl at line no. 184
This Section of script should be removed or commented out:
This should now fix the problems your users have been having with missing Upload Buttons on Apple Devices
Ensure you make a backup of any files you change to ensure you can always revert back if needed.
This change will need to be Done each time your Update SocialEngine until the problem is resolved by SocialEngine