Permission issue. Administrator do not have read/write access to folders. OS won't let administrator get read/write access.

[sagved]

Hi,

In Big Sur, I (administrator user) only have read access to the folders: /System, /Library, and /Users. By right-clicking on these folders, in the show info-box I am not allowed to change the permission for administrator to read/write.

As administrator I want read/write access to all of these folders. How can I get it?

 

[chabig]

First, you should never write to /System. That's reserved just for system software. You can write to /Library and /Users but beginning with Catalina they are all protected by System Integrity Protection (SIP) to protect against malware. If you want to modify those areas you must turn off SIP.

About System Integrity Protection on your Mac - Apple Support

System Integrity Protection is a security technology that helps protect your Mac from malicious software.

support.apple.com

Apple Platform Security

Learn how security is implemented in Apple hardware, software, apps, and services.

support.apple.com

 

[sagved]

Thank you for quick and good answer.

I think I want SIP enabled by default. However, if there is some specific file I want to change (lets say in a subfolder in /Library), is there a easy way to do this without turning off SIP?

 

[chabig]

if there is some specific file I want to change (lets say in a subfolder in /Library), is there a easy way to do this without turning off SIP?

I think SIP is good for us too. But there is no way to change files in /Library with it on. You'll have to turn SIP off to delete files. If you think you want to add something there, consider whether it could be put in the user's library instead.

We are approaching the limits of my comprehension. I only know what I've read. There is a lot of good information on the web.

Big Sur’s Signed System Volume: added security protection

From SIP to a protected read-only System volume, macOS 11 takes system protection a big step further with cryptographic verification.

eclecticlight.co

 

[motorm3]

I've tried everything to unlock to get access to write but no luck if someone could help i need it unlocked to modify apple backlight kext so I can have full brightness like i did in catalina. So I can do this in big sur.
The following guide will work on any MXM swapped card that has Brightness control enabled either through OpenCore (K2100m/K1100M) or Natively (K4100M) doing so allows for the Native Apple kext to be used and Not AppleBacklightFixup.kext

Here is a short guide on how to create your own AppleBacklight.kext for the 27” 2011 (F10Ta007) iMac. The same could be done for the 2010 iMac (F10T9cd7) and 2009 iMac (F10T921e)

1. Navigate to /System/Library/Extensions, find the AppleBacklight.kext and drag it to the Desktop.

2. Right click on the kext to show package contents open contents/info.plist. with TextEdit.

3 With info.plist Open in we need to Find the original value “F10Ta007”/“F10T9cd7/“F10Ta007” and NULL it out, This value is based on your iMacs Display year/Model. Enter Null or whatever value you want here.


4. Now to Fix Brightness we need to Replace the screen Value to the one that belonged to a 21.5” iMac, this Value is F10Ta00cM. Find this value using Find in TextEdit.


5. Replace Value F10Ta00cM with the one for your iMac’s Display model, I’m using a 2011 27” so the value is “F10Ta007”

Code:
<key>F10Ta007</key> (2011 Model used)
<data>
ABEAGAA3AF8AigCzAOsBJAFnAakB1AIJAlQCogL4A00D
</data>
Make sure your Data entry looks like this one above. Save info.plist

6. Reinstall AppleBacklight.kext using kext Utility. Catalina users need to Unlock their System Partition using Hackintool first.

.

You should Now have proper (2009-2011) 27” iMac Backlight stepping that will properly Dim and raise you’re LCD to full brightness.please help

 

[Balsie]

I've tried everything to unlock to get access to write but no luck if someone could help i need it unlocked to modify apple backlight kext so I can have full brightness like i did in catalina. So I can do this in big sur.
The following guide will work on any MXM swapped card that has Brightness control enabled either through OpenCore (K2100m/K1100M) or Natively (K4100M) doing so allows for the Native Apple kext to be used and Not AppleBacklightFixup.kext

Here is a short guide on how to create your own AppleBacklight.kext for the 27” 2011 (F10Ta007) iMac. The same could be done for the 2010 iMac (F10T9cd7) and 2009 iMac (F10T921e)

1. Navigate to /System/Library/Extensions, find the AppleBacklight.kext and drag it to the Desktop.

2. Right click on the kext to show package contents open contents/info.plist. with TextEdit.

3 With info.plist Open in we need to Find the original value “F10Ta007”/“F10T9cd7/“F10Ta007” and NULL it out, This value is based on your iMacs Display year/Model. Enter Null or whatever value you want here.


4. Now to Fix Brightness we need to Replace the screen Value to the one that belonged to a 21.5” iMac, this Value is F10Ta00cM. Find this value using Find in TextEdit.


5. Replace Value F10Ta00cM with the one for your iMac’s Display model, I’m using a 2011 27” so the value is “F10Ta007”

Code:
<key>F10Ta007</key> (2011 Model used)
<data>
ABEAGAA3AF8AigCzAOsBJAFnAakB1AIJAlQCogL4A00D
</data>
Make sure your Data entry looks like this one above. Save info.plist

6. Reinstall AppleBacklight.kext using kext Utility. Catalina users need to Unlock their System Partition using Hackintool first.

.

You should Now have proper (2009-2011) 27” iMac Backlight stepping that will properly Dim and raise you’re LCD to full brightness.please help

I've tried everything to unlock to get access to write but no luck if someone could help i need it unlocked to modify apple backlight kext so I can have full brightness like i did in catalina. So I can do this in big sur.
The following guide will work on any MXM swapped card that has Brightness control enabled either through OpenCore (K2100m/K1100M) or Natively (K4100M) doing so allows for the Native Apple kext to be used and Not AppleBacklightFixup.kext

Here is a short guide on how to create your own AppleBacklight.kext for the 27” 2011 (F10Ta007) iMac. The same could be done for the 2010 iMac (F10T9cd7) and 2009 iMac (F10T921e)

1. Navigate to /System/Library/Extensions, find the AppleBacklight.kext and drag it to the Desktop.

2. Right click on the kext to show package contents open contents/info.plist. with TextEdit.

3 With info.plist Open in we need to Find the original value “F10Ta007”/“F10T9cd7/“F10Ta007” and NULL it out, This value is based on your iMacs Display year/Model. Enter Null or whatever value you want here.


4. Now to Fix Brightness we need to Replace the screen Value to the one that belonged to a 21.5” iMac, this Value is F10Ta00cM. Find this value using Find in TextEdit.


5. Replace Value F10Ta00cM with the one for your iMac’s Display model, I’m using a 2011 27” so the value is “F10Ta007”

Code:
<key>F10Ta007</key> (2011 Model used)
<data>
ABEAGAA3AF8AigCzAOsBJAFnAakB1AIJAlQCogL4A00D
</data>
Make sure your Data entry looks like this one above. Save info.plist

6. Reinstall AppleBacklight.kext using kext Utility. Catalina users need to Unlock their System Partition using Hackintool first.

.

You should Now have proper (2009-2011) 27” iMac Backlight stepping that will properly Dim and raise you’re LCD to full brightness.please help

Hello, good afternoon, I have a question about this item.
I'm on a 27" - mid 2010 and have a GTX780M running Mojave.
I've changed the values, but I don't understand the last item about "code". (see attached print screen).
Where to place that?
Kind regards, Ben