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[Release] macOS Big Sur 11.0.1


Wayang-NT
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@ameenjuz, overall, the process in Bug Sur retains the same general philosophy as before. The procedure you followed as described missed the permissions repair part that's always been necessary after copying kexts to /L/E.

 

Permissions_LE_BigSur.jpg

 

kext_caching_BigSur.jpg

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On 11/30/2020 at 9:52 AM, Hervé said:

@ameenjuz, overall, the process in Bug Sur retains the same general philosophy as before. The procedure you followed as described missed the permissions repair part that's always been necessary after copying kexts to /L/E.

 

 

Spoiler

Permissions_LE_BigSur.jpg

 

 

 

Spoiler

kext_caching_BigSur.jpg

 

Please guide me how to rebuild kernel colloction and repair permission

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Manually install kexts to System/Library/Extensions.   

Change the paths for /Libary/Extensions

 

You need to enter recovery mode, open terminal, type at prompt  csrutil status

hit enter

verify response is "disabled"

if not run at prompt: csrutil disable

 

type at prompt csrutil authenticated-root status

hit enter

verify response is "disabled"

if not run at prompt: csrutil authenticated-root disable

 

reboot into recovery mode if required

 

open terminal, at prompt run: mount

hit enter

verify volumes, disk numbers, slices.

confirm with: diskutil list

 

at prompt type:

diskutil mountDisk diskXsY  where X is the Big Sur disk number and Y is the Big Sur slice.

hit enter

,

at prompt type:

mount -uw /Volumes/your Big Sur volume name

hit enter

 

at prompt type: mount

hit enter

Your Big Sur volume should no longer indicate read-only

 

at prompt:  cp -r where/ever/your/kext/is/whatever.kext /Volumes/your Big Sur volume name/System/Library/Extensions

hit enter

for each kext:

 

at prompt: chown -R 0:0 /Volumes/your Big Sur volume name/System/Library/Extensions/target.kext && chmod -R 755  /Volumes/your Big Sur volume name/System/Library/Extensions/target.kext

hit enter

 

then type at prompt:  touch /Volumes/your Big Sur volume name/System/Library/Extensions/whatever.kext(s)

hit enter

 

then type at prompt: kmutil install --volume-root /Volumes/your Big Sur volume name  --update-all --force

hit enter, wait for finish

 

then type at prompt: /Volumes/your Big Sur volume name/usr/sbin/kcditto

hit enter, wait for finish

 

then type at prompt:

bless --folder /Volumes/your Big Sur volume name/System/Library/CoreServices --bootefi --create-snapshot

hit enter, wait for finish

 

reboot

Edited by HenryV
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That says it all !!! It's a ridiculous process...

-> It you want to cache kexts in Big Sur, do so from /L/E same way it was done in previous OS X/macOS versions.

 

@ameenjuz, would you please stop this insufferable quoting! And I told you what you ought to do, so please pay attention!

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  • 2 weeks later...

Is there any way to downgrade Safari from 14 to 13? I have a very frustrating RAM usage issue when streaming 1080p videos. As you can see it's ridiculous high usage. It's eating up my swap so much and the system will become unusable. Not happening with Safari 13 on Catalina. If I just copy Safari 13 from Catalina it doesn't really work. This is also happening on a real MacBookAir (2017) and an iMac17,1, Notebook 1-2, and on my PC hack.

638932_kepernyofoto_2020-12-05_12_33_00.thumb.png.91062b1371ee79058e8e07366af08a81.png

Edited by kushwavez
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It's only happening on 1080p streaming sites (usually high demanding ones for example HEVC FLAC videos) (except YouTube).

Well, it's a bug with Big Sur because as I said it's happening on 5 system including real Macs too. It's not happening on Catalina.

 

On Activity Monitor View settings enable "All processes" and watch kernel_task.

 

Ways to reproduce:

Open a 1080p streaming site (for ex. some series streamer sites or smth like that) and start a video.

Pause it, go to another tab, then go back.

Unpause it.

Watch kernel_task goes all the way up

 

Edited by kushwavez
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29 minutes ago, kushwavez said:

Ways to reproduce:

Open a 1080p streaming site (for ex. some series streamer sites or smith like that) and start a video.

Pause it, go to another tab, then go back.

Unpause it.

Watch kernel_task goes all the way up

 

I tried to follow your instructions as best as I can to induce the kind of behavior by opening and playing a film on Netflix and took a screen shot to see if it is the same on mine - Have a look and see if I am missing something here or I didn't quite follow your directions.

PS - I just came across this - https://developer.apple.com/forums/thread/663850 - someone posted about the same problem.

Spoiler

1949915144_ScreenShot2020-12-09at19_29_22.thumb.png.d90316ca129c9440de036a2ed19496d0.png

 

Edited by eSaF
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9 hours ago, kushwavez said:

It's only happening on 1080p streaming sites (usually high demanding ones for example HEVC FLAC videos) (except YouTube).

Well, it's a bug with Big Sur because as I said it's happening on 5 system including real Macs too. It's not happening on Catalina.

 

On Activity Monitor View settings enable "All processes" and watch kernel_task.

 

Ways to reproduce:

Open a 1080p streaming site (for ex. some series streamer sites or smth like that) and start a video.

Pause it, go to another tab, then go back.

Unpause it.

Watch kernel_task goes all the way up

 

 

I tried to replicate this problem and found that I could replicate it but only on certain websites.  The problem did not occur on YouTube or Netflix.  Knowing what people often stream at 1080p, I checked other sites and streaming 1080p gobbled up my memory.  It was worse streaming 2160p.  Don't blame your system for the websites you choose to frequent.  Perhaps another browser will serve you better.  Otherwise, use Activity Monitor to decide which websites to avoid.

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Here, a pretty good example of the problem. Well, I have to use Chrome because of this, but I don't like it because then I can't use iCloud tabs, etc. If it'll not improve in later versions of Big Sur, then I'll going back to Catalina unfortunately. That's why I wondered if I could downgrade Safari to 13 or not.

https://streamable.com/bkojg7

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