I have built a calendar in Photos Version 2.0 (3161.4.140).
When I go to purchase it, it says I need to upgrade the version of Photos, as ordering is no longer available in this version.
How do I upgrade the version of Photos?
If it is through the OS, I think I'm already current.
MacBook Air, macOS Sierra (10.12.6)
Apple stopped the print services on September 30 this year.
to order calendars or other print projects you need to use third party project extensions. The project extensions are supported in Photos 3.0 n High Sierra or Photos 4.0 on Mojave.
To upgrade to Photos 3.0 or 4.0 you need to upgrade your system version, because Photos is installed as a prt of the system. It cannot be upgraded separately.
Here is a recent user tip by OT: : Old Toad: Post 9/30/2018 Printing Options for Photos
See these support documents: Create and order print products in Photos with Project Extensions - Apple Support
also: Use Project Extensions to order print products in Photos after September 30, 2018
since your Calendar is already finished, you could save it as a PDF file and send it to a different print service, for example Presto Photos:
Photo Book Printing, Color Book Printing, and Calendar Printing - PrestoPhoto
cannot order calendar
