Audacity has only partial support for Mac Sierra. The team found that on a subset of Mac Sierra machines some important extensions to the core of Audacity become unavailable. Full details here: Partial support for Sierra. This problem also affects Audacity 2.1.2. Audacity 2.1.3 takes steps to reduce the problems, but does not fix them entirely. Audacity 2.1.3 is also the last version of Audacity that will officially support Windows XP.
#Musicproduction: Audacity updated to v2.1.3 #freedownload