[quote='878482022, Pavel, /thread/817602?answerId=878482022#878482022, /profile/Pavel'] Our IPC implementation is based on [/quote] I find it strange that this is limited to sockaddr_un. macOS is not unusual in longer paths; I don’t know about Linux, but pretty much all the BSDs work this way. [quote='878482022, Pavel, /thread/817602?answerId=878482022#878482022, /profile/Pavel'] Are there any guarantees the path returned by this function will always fit within the buffer sockaddr_un? [/quote] I’ve never seen such a guarantee. [quote='878482022, Pavel, /thread/817602?answerId=878482022#878482022, /profile/Pavel'] are there any other locations for IPC sockets that avoid this path length restriction? [/quote] The traditional location for this stuff is /var/run. See the hier man page. But if you do use that, choose an appropriately unique file name to avoid collisions with the system and other third-party products. Typically that means using reverse DNS or embedding your company or product name