Many MAC users when trying to create a database would see this error. Can not access lock files directory /tmp/firebird/ In order to fix this you have two options: Give write/read permissions to `/tmp/firebird` to your user use sudo to run isql Let’s fix the problem using sudo cd /Users/YOUR_USER/` mkdir dbs $ cd /Library/Frameworks/Firebird.framework/Resources $ … Continue reading Firebird (mac) Create a database