When the macro security settings are set to high or very high, a message box announces that macros can't be run and that this behaviour can be set in Extras/Optionen/LibreOffice/Sicherheit (in German). This path for the settings might be correct for Windows or Linux, on MacOS however it is Einstellungen/LibreOffice/Sicherheit.
English message needs to be fixed. http://opengrok.libreoffice.org/xref/core/svx/source/src/errtxt.src#472 ERRCODE_SFX_DOCUMENT_MACRO_DISABLED
Andras Timar committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=9bc097419568e61018b95148ad2a8181665051f9 fdo#44698 settings are under a different menu in Mac OS X