Just like the Windows operating system, the MacOS operating system has a hidden Library folder full of settings you shouldn’t really touch. Deleting some or all of these settings will at best force you to reinstall certain apps, and at worst, cause the whole system to collapse and require a complete reinstall.

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Jun 01, 2011 Did you know that you can have Mac OS X run a script whenever you log in to your computer? You can if you create a 'login hook.' A login hook tells Mac OS X to execute a certain script when a user logs in. Unlike Startup Items that open when a user logs in, a login hook is a script that executes as root. This advanced article shows you how to set up a login hook.With a login hook: The. Jun 10, 2015 Up to OS X 10.7 Lion, accessing the Library folder was quite simple; all you needed to do is navigate to your Home folder, and from there you could access the Library folder. But from OS X 10.8 onwards, Apple has hidden the Library folder, meaning it won’t show up in your Home folder anymore.

But there may be times when accessing the Library folder is necessary. For example, many apps put backups in the Library folder and you may want to back up the backup. Or you might be customising your Mac, which will need access to certain library folders.

Here is how to get there and not cause your Mac to collapse in a cloud of dust in the process.

What Is The Library Folder On MacOS?

The library folder is the area of your MacOS computer where app settings are stored. When you install a program, a folder is created in the Library for all of the essential settings. This can be anything from plugins, preference files and log files.

It’s hidden because basically some people are just plain clumsy and quite often don’t know what they are deleting. It’s only when it’s too late when they realise that something they just deleted should have been kept.

So you could say that Apple is protecting you against your own worst impulses!

How To Find The Hidden Library Folder On MacOS

There are two ways to get to the hidden Library folder if you are confident enough of not triggering a nuclear apocalypse. But the second way is only really feasible when you know where to look.

First Method (The Easiest)

Go to Finder and drop down the “Go” menu. You’ll see that the Library folder is not listed.

To make the Library folder appear, press the “Alt” key (also known as the Option key) at the bottom left of your keyboard. The Library folder will now appear.

Click on the Library folder option to be taken straight to the folder.

The problem though with this method is that this is very temporary. As soon as you take your finger off the alt key, the Library folder will disappear again.

Second Method (Not Difficult)

Once you know the path to the folder (by following the previous method), you can then use the path to go directly to the Library folder.

At the top of the Library folder, you will see the exact path (location) of the folder on your computer.

I have covered over my username in the screenshot, but the path is : https://renewexcel.amebaownd.com/posts/18897203.

With that in mind, go back to Finder’s Go menu and at the bottom, you’ll see this option :

Choosing “Go to Folder” will bring up a box where you can type the path to the Library folder. Hitting the “enter” key will then take you straight there.

Even better, until you input the path to a different folder, the path to the Library will remain in the “Go to Folder” box.

When it is gone, dropping down the menu arrow on the right hand side will show you a list of previous folders you went to, and the Library one will be there too.

Conclusion

There used to be a way to keep the Library folder showing permanently. But as of High Sierra, the Terminal command no longer seems to work.

However, keeping the folder permanently visible isn’t a good idea since you might delete a system-critical file. Besides, as you have just seen, it is not difficult at all to go to the folder when you need it.

System Integrity Protection
Developer(s)	Apple Inc.
Operating system	macOS
Website	developer.apple.com/library/content/documentation/Security/Conceptual/System_Integrity_Protection_Guide/Introduction/Introduction.html

System Integrity Protection (SIP,^[1] sometimes referred to as rootless^[2]^[3]) is a security feature of Apple's macOSoperating system introduced in OS X El Capitan (2015) (OS X 10.11). It comprises a number of mechanisms that are enforced by the kernel. A centerpiece is the protection of system-owned files and directories against modifications by processes without a specific 'entitlement', even when executed by the root user or a user with root privileges (sudo).

Jul 22, 2011 Hold Option and Use the “Go” Menu to Show Library. Holding down the Option key will show the “Library” directory as an option in the Finders Go menu. The other nice thing about the Go menu is that after you have accessed /Library on multiple occasions, it will start to appear in the “Recent Folders” submenu for easy repeat access. https://renewexcel.amebaownd.com/posts/18897151. Aug 23, 2011 ShowLionLibrary reveals the Library folder in OS X 10.7 Lion. In version 10.7 of Mac OS X (Lion), the powers that be decided that we needed the Library folder hidden. I don't know about you, but I'm in that folder all the time. It turns out there is a simple shell command to reveal the Library folder which is chflags nohidden /Library/. Jul 04, 2011 Show User Library Directory in Mac OS X 10.7 Lion & 10.8 Mountain Lion Jul 4, 2011 - 86 Comments Modern Mac OS releases from Mac OS X 10.7 & OS X 10.8 onward default to hiding the users Library directory, this is probably to keep people from accidentally deleting or damaging files that are necessary for OS X Lion & Mountain Lion to function properly.

Apple says that the root user can be a significant risk factor to the system's security, especially on systems with a single user account on which that user is also the administrator. System Integrity Protection is enabled by default, but can be disabled.^[4]^[5]

Justification[edit]

Apple says that System Integrity Protection is a necessary step to ensure a high level of security. In one of the WWDC developer sessions, Apple engineer Pierre-Olivier Martel described unrestricted root access as one of the remaining weaknesses of the system, saying that '[any] piece of malware is one password or vulnerability away from taking full control of the device'. He stated that most installations of macOS have only one user account that necessarily carries administrative credentials with it, which means that most users can grant root access to any program that asks for it. Whenever a user on such a system is prompted and enters their account password – which Martel says is often weak or non-existent – the security of the entire system is potentially compromised.^[4] Restricting the power of root is not unprecedented on macOS. For instance, versions of macOS prior to Mac OS X Leopard enforce level 1 of securelevel, a security feature that originates in BSD and its derivatives upon which macOS is partially based.^[6]

Functions[edit]

The 'prohibitory symbol'^[7] is shown when macOS is not allowed to complete the boot process. This can happen when 'kext signing' is enabled and the user installed an unsigned kernel extension.

System Integrity Protection comprises the following mechanisms:

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