Following from https://bugs.documentfoundation.org/show_bug.cgi?id=100994 In the meantime, for users that are experiencing the crash (likely on a 5k iMac), please change your color profile (System Preferences > Display > Color) to the Standard iMac Apple RGB profile for the time being. Yeah. Setting this to "Apple RGB" [or Generic RGB] leads to a working LO on iMac 5k. Switching back to "iMac" results in a freeze after the next action in LO.