Some advanced Mac users may have noticed that certain shell scripts with cron, cron jobs, and crontab are either not working at all, or not able to function properly in the newest versions of MacOS, notably Mojave 10.14, Catalina 10.15 and later. Depending on the situation, this may be accompanied by a permissions error, an operation not permitted error, or a script or cronjob may simply fail silently in the background. While there are numerous reasons a cronjob may fail, strict security measures in the latest MacOS releases may also be at fault and cause problems…