Apple sent an email reminder to developers working on apps for the Mac App Store letting them know that new programs will have to be compatible with the platform's forthcoming "sandboxing" constraints in order to be offered in the Mac App Store. Developers are expected to implement sandboxing within their apps by June 1, though existing programs can be updated after that date. Apple has previously extended the deadline for app sandboxing, first November 2011 to March 2012, and later to June 2012.
