The grid servers are in the process of being updated from OS X 10.10.5 to 10.11.3 – which is a major update that will both result in increased stability and performance. The servers are running mono 4.2.1-102. The grid will be down for about an hour while the last and critical server is being updated.
Next the databases will be migrated from PostgreSQL 9.4.5 to 9.5. This is also a major update and the grid will be down for the database migration. The 9.5 update will prompt code changes that will fix some long standing bugs when running the grid with PostgreSQL.