Category: Command Line

How to Create macOS Big Sur Beta Bootable USB Install Drive

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Advanced Mac users often want to make a boot disk installer for macOS Big Sur beta, allowing for something like a USB flash drive to be used to boot and install macOS Big Sur onto any compatible Mac.

Bootable MacOS installer USB drives provide for the ability to clean install macOS Big Sur, update to macOS Big Sur, install macOS Big Sur beta onto multiple Macs without redownloading the installer, as well as the ability to use Disk Utility to partition and erase a machine, perform Time Machine restorations, and more.

If you’re interested in creating a macOS Big…

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How to Convert a MacOS Installer to ISO

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Advanced Mac users may wish to convert a MacOS Installer application into an ISO file. Typically the resulting installer ISO files are used for installing macOS into virtual machines like VMWare or VirtualBox, but they can also be used to burn the ISO to media to create a boot disk. This offers an alternative to creating a bootable USB flash drive for MacOS installers as well.

This tutorial will walk through the steps to create an ISO file of a MacOS installer.


In this particular walkthrough, we’ll be converting a MacOS Mojave installer application into an…

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How to Create a Bootable MacOS Catalina Installer Drive

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Some Mac users may wish to create a bootable MacOS Catalina installer drive, typically using a USB flash drive or with another similar small boot disk.

Bootable USB installers offer an easy way to upgrade multiple Macs to macOS Catalina, to perform clean installs of MacOS Catalina, to perform maintenance from a boot disk like formatting disks, modifying disk partitions, and performing restorations, and much more.

We’ll walk through how to create a boot USB install drive for MacOS Catalina 10.15.

Requirements to Create a Bootable macOS Catalina USB Install…

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How to List All Cron Jobs on a Mac or Linux PC

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Need to quickly see a list of all cron jobs on a computer? You can easily see all scheduled cron jobs by using the crontab command, and seeing cron data works the same on Mac as well as Linux and most other unix environments too.

Perhaps you have a script or task running and you’re trying to track it down, or perhaps you’re just curious and want to show all crontab for any other reason. Read on to learn how to show all cron jobs for all users, as well as for specific users on a computer.

How to Show All Cron Jobs

At the Terminal or command line, enter the…

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How to Enable Startup Boot Sound Chime on Newer Macs

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Want to re-enable the startup boot chime sound effect on a new Mac? You can do that with a command line string entered into the Macs Terminal. As you may know, new Macs default to not making a startup boot chime sound effect, this is in contrast to every prior Mac model which included a boot sound effect.

With a little effort, you can enable the boot startup sound effect on modern Macs however, including newer model MacBook Pro, MacBook Air, MacBook, iMac, Mac mini, and Mac Pro.

How to Enable Startup Chime on Macs

Here is how you can enable the Mac startup boot…

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How to Fix Cron Permission Issues in MacOS Catalina & Mojave

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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…

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How to Download Full MacOS Installers from Command Line

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Mac users can download full complete MacOS installers directly from the command line. This is an incredibly useful feature particularly if you want to build USB boot drive installers, you manage multiple Macs, or you simply want to have full access to a complete installer application of MacOS for any other purpose.

With this particular trick, you can download complete “Install MacOS” application packages directly from the Terminal application, and it works to get full installers of MacOS Catalina, Mojave, and High Sierra too.


This particular…

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