The company told users of its Media Composer, Pro Tools, Sibelius, Eucon and Isis offerings v10.11 was not supported at the moment, and urged them not to upgrade until it had fully tested the software. Pro Tools is not known to have any issues at the moment, according to Avid. Version 10.11 of the software, which was released last week, promises split screen working, faster launch times and “more fluid graphics performance in…high-performance apps”.īut Avid said the software caused Media Composer to suffer from unpredictable GUI performance including slowness when opening and closing windows or bins, while composition software Sibelius crashed when a score was closed.