Please find a summary below of which products are supported under Mountain Lion:.

Gatekeeper

Gatekeeper will need to be disabled for any software/drivers that are not officially supported. You can disable it here:

System Preferences -> Security & Privacy -> General -> Allow applications downloaded from: Anywhere

Automap

Early tests show that, once Gatekeeper is disabled, Automap 4.4 works without problems. Official Mountain Lion support is planned for Automap 4.5.

Launchpad

Preliminary tests show no issues. Ableton Live 8.3.1 supports Mountain Lion so make sure your version of Live is up-to-date.

Dicer

No known issues. Serato Scratch Live 2.4.3 or above must be used.

SL MkII

No known issues.

Impulse

No known issues.

Nocturn

No known issues.

Twitch

No known issues. ITCH 2.2.2 or above must be used.

UltraNova

Preliminary tests show no issues.

V-Station

Version 2.0b3 is now available on the Novation beta site and adds Mountain Lion support - Novation Beta site

B-Station

Version 1.8b1 is now available on the Novation beta site and adds Mountain Lion support - Novation Beta site

NOTE : It is recommended that you check whether your audio software/DAW is compatible with Mountain Lion before upgrading. Please check the manufacturers website for details.