In last day user reported that in SharePoint designer 2013, workflow option for 2013 not showing in dropdown box.
We find that SharePoint 2013 workflow options available for other web application's site collections.
Although there could be many reason because in SharePoint 2013 workflow have different architecture but since workflow are available for the other web application so we were sure that workflow is fine something is wrong with the site collection or association, so our first place to check service association with webapplication
follow below steps
a. In central admin go to manage web application in Application management heading.
b. click on the web application where you are getting issue
c. in ribbon click in button it will open a window where we can see all the service application proxy associated with troubled web application.
d. scrawl down and you check whether below option checked , in our case workflow service application proxy was not checked.
e. if in your case it is uncheck that go to top of the same window and from the drop down select custom option it will show you all the option so you need to check all required service proxy that your web application want to consume. this done
f. close your already open designer and aging open check Workflow 2013 option will be there. Hope this help you.