Mac lovers (who can use C/C++ and a debugger), As your MariaDB developers are hard at work getting 10.5 ready for you, unfortunately a bug has slipped into the 10.5 branch making it unusable on OSX (at least that's what it looks like on the CI infrastructure). The bug report is here: https://jira.mariadb.org/browse/MDEV-22173 As the time of developers is a little short as is the availability of OSX hardware, I'm hoping some of you are able to spend a few hours tackling this task to understand it better, and if possible, create patch. Steps: 1. build environment https://mariadb.com/kb/en/Build_Environment_Setup_for_Mac/ 2. clone the source git clone --branch 10.5 https://github.com/MariaDB/server.git mariadb-server cd mariadb-server git submodule update --recursive --init 3. build instructions https://mariadb.com/kb/en/generic-build-instructions/ (you don't need to install) 4. test (from build directory) mysql-test/mysql-test-run main.select might be useful here: --debugger=NAME or --gdb client-debugger=NAME or client-gdb To collaborative share your findings and to ask for further help MariaDB's community chat stream has been created for you. https://mariadb.zulipchat.com/#narrow/stream/118759-general/topic/Get.20OSX.... To paraphrase J.F.Kennedy ask not what your database server community can do for you — ask what you can do for your database server community. Keep the community spirit going, Daniel Black -- Sent as a community member who noticed OSX failures and that everyone is busy