We have been informed that SQL Server 2012 with SP2
Slipstream ISO images do not install SP2.
Unfortunately there is the same issue that we had with SP1
that was documented here. The same workaround applies.
We are working on fixing this issue. I will get back to you
with more details and timeline as soon as possible.
Senior Program Manager/SQL Server.
– Servicing PM of High Availability and Mobile Technologies.
– Feature PM Replication Technologies.
– Business owner/release PM of Service Packs.
July 18th 2014: this issue is fixed. Please refer to http://blogs.msdn.com/b/sqlreleaseservices/archive/2014/07/18/sql-server-2012-with-sp2-slipstream-iso-images-fixed.aspx