start Automator.app. select Application. click Show library in the toolbar (if hidden) add Run shell script (from the Actions/Utilities) copy & paste your script into the window. test it. save somewhere (for example you can make an Applications folder in your HOME, you will get an your_name.app) Head to General in the left-hand sidebar and then click Login Items. Apple via Justin Pot. At the top of the panel, you’ll see all the applications that are set to open as soon as your Mac
For many years, Macs have relied on sets of keys held at startup to enable specific modes. Most notably, pressing Option displays the Startup Manager and lets you pick a boot drive, Command-R starts up from macOS Recovery, Command-Option-P-R resets the NVRAM, Shift starts up in Safe mode, D opens Apple Diagnostics to check the hardware, and T starts up in Target Disk Mode.
Press and hold the Shift key and then click on Continue in Safe Mode. Your Mac will then restart automatically. When you get to the login window, you should see “Safe Boot” in the menu bar. Intel processor: Turn on your Mac and then immediately press and hold the Shift key until you see the login window.
It is strange to see the questions between "windows migrated" and "default mac" users. :) Windows migrated users usually want "somewhat tweak" the system. Default Mac users - simply "using it". I'm using MAC much years, and never needed to use the launchctl command. If mean never, mean in normal usage, of course sometimes needed use it when

Mac App Store Apps Avoid Most Issues . Apps you download from the App Store usually just work. Again, this is because any apps available there must adhere to Apple's guidelines, which means staying abreast of Apple's rules with frequent updates and fixes. Anything you download from the App Store is signed and won't be stopped by Gatekeeper.

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mac start application on startup