[pre-release] macOS Tahoe

[Oyecomova]

26.0 Beta (25A5349a)
Audio does not work with MyKextInstallerv AppleHDA.kext and KDK_26.0_25A5349a.kdk

[mandstef]

Hi, i don't receive the incremental update, i get the full size of beta 8

I try to add also -wegnoegpu into boot-args but after reboot the system hang, try also to reset nvram

Can someone help me how to get the incremental updates?

I can also try to install the full size, but i don't know if the system will crash

[Anto65]

@Oyecomova

Am I wrong or are you at the first Beta ( 25A5279m ) ? 🤔

 

Thanks for highlighting the new KDK

26_build_25A5349

 

Available on https://developer.apple.com/download/all/

Spoiler

 

On GitHub

https://github.com/dortania/KdkSupportPkg/releases/tag/25A5349a

 

And via the OCLP-MOD app 

Spoiler

 

Edit :

 

Restored the snapshot and installed the new KDK.
AppleHda and Launchpad with OCLP-MOD are all working.

Edited August 25, 2025 by Anto65

[Mirone]

3 minutes ago, mandstef said:

Hi, i don't receive the incremental update, i get the full size of beta 8

I try to add also -wegnoegpu into boot-args but after reboot the system hang, try also to reset nvram

Can someone help me how to get the incremental updates?

I can also try to install the full size, but i don't know if the system will crash

Restore SnapShot and try again.

[meg2014]

Beta 8 is out!

 

You just know that the RC is not far behind this release.....

 

 

 

Edited August 25, 2025 by meg2014

[kgp]

Up and running Tahoe DP8 after the standard update procedure with respect to WhateverGreen.kext and OCLP-Mod 3.0.0 💫

 

[Anto65]

@webipsum  There it is

 

Beta 8 ( 25A5349a )

 

Full Installer

https://swcdn.apple.com/content/downloads/43/10/093-26142-A_NTCTG95AMR/1yn07o4d4iebndy533oracgub1q5y17mnu/InstallAssistant.pkg

 

Spoiler

 

 

 

 

Edited August 25, 2025 by Anto65

[pico joe]

as usual disabled/enabled WEG while process

 

Spoiler

 

Edited August 25, 2025 by pico joe

[Montblanc]

@ameenjuz

 

Try disabling Bluetoolfixup.kext, rebooting and resetting Nvram before trying to install OTA update.

[jlrycm]

40 minutes ago, Montblanc said:

@ameenjuz

 

Try disabling Bluetoolfixup.kext, rebooting and resetting Nvram before trying to install OTA update.

Restricted Events and sbvmm boot arg too?

[fernando.c.neves]

macOS Tahoe Beta 8 working like a charm...

 

My new EFI for macOS Tahoe Beta 8 (All Kext´s from 25-08-2025)

 

 

Edited August 26, 2025 by fernando.c.neves

[naiclub]

Spoiler

 

[CloverLeaf]

Anybody have Intel bluetooth working correctly? Trying to get mine on AX200NGW and still no bueno. Wifi works great with itlwm + Heliport. I am using the latest available kexts - BlueToolFixup, IntelBluetoothFirmware and IntelBTPatcher (all working well in Sonoma/Sequoia on my other machines with 9560NGW and AX211). My USB mapping is done right + have HS14 reserved for the Bluetooth. Any ideas of what eventually could be wrong or missing is deeply appreciated  

 

[jm26200]

Done

 

[nmano]

15 Ports with Type-C via SSDT.aml

All 15 ports accounted for in IORegistryExplorer

Remove any USB Kexts if you add.

 USB 2.0 devices work in HS ports

 USB 3.0 devices work in SS ports (at proper speeds)

 The Type-C port works in both orientations

 Internal devices (Bluetooth, etc.) still work

 Sleep/wake functionality preserved

No kernel panics or instability

 

SSDT-XHC.aml

 

 

[surenmunoo]

Done and dusted. 1.7G update and pain free.

 

[naiclub]

1 hour ago, nmano said:

15 Ports with Type-C via SSDT.aml

All 15 ports accounted for in IORegistryExplorer

Remove any USB Kexts if you add.

 USB 2.0 devices work in HS ports

 USB 3.0 devices work in SS ports (at proper speeds)

 The Type-C port works in both orientations

 Internal devices (Bluetooth, etc.) still work

 Sleep/wake functionality preserved

No kernel panics or instability

 

SSDT-XHC.aml 680 B · 4 downloads

 

 

I tried yours, but it won't boot at all. Do you have any tips? Please share them with me. So how is this different from USB port mapping?
(Sorry for getting a little off topic.)

[nmano]

41 minutes ago, naiclub said:

I tried yours, but it won't boot at all. Do you have any tips? Please share them with me. So how is this different from USB port mapping?
(Sorry for getting a little off topic.)

Before test Check Devices

External (_SB_.PC00.XHCI, DeviceObj)    // (from opcode)
    External (_SB_.PC00.XHCI.RHUB, DeviceObj)    // (from opcode)
Check IORegistryExplorer

[crazybirdy]

Since startosinstall didn't work with --volume anymore,

we can only use "startosinstall --eraseinstall --newvolumename macname" to clean install on boot system.

 

So, I install 26 25A5349a directly on 15.6.1 to an empty APFS partition, everthing work fine with WhateverGreen.kext things for RX460.

  Hide contents

 

Done.

 

Edited August 26, 2025 by crazybirdy

[naiclub]

2 hours ago, nmano said:

Before test Check Devices

External (_SB_.PC00.XHCI, DeviceObj)    // (from opcode)
    External (_SB_.PC00.XHCI.RHUB, DeviceObj)    // (from opcode)
Check IORegistryExplorer

I think USB mapping should be sufficient.
Plus, I'm getting satisfactory speeds.

Spoiler

I would like to ask the board administrators for permission to digress.

Edited August 26, 2025 by naiclub

[kaoskinkae]

Perfect in NEW: and OLD well always in both it has been perfect in this case In order to have sound I don't know if it is correct I had to install both Kernel Debug Kit 26 build 25A5349a from an hour ago does not have the AppleHDA.kext present but it is present in Kernel Debug Kit 26.0 build 25A5279m

 

without kext WhateverGreen.kext in the first two reboots, the last one activates the kext and the system enters perfect

[naiclub]

36 minutes ago, kaoskinkae said:

Perfect in NEW: and OLD well always in both it has been perfect in this case In order to have sound I don't know if it is correct I had to install both Kernel Debug Kit 26 build 25A5349a from an hour ago does not have the AppleHDA.kext present but it is present in Kernel Debug Kit 26.0 build 25A5279m

 

without kext WhateverGreen.kext in the first two reboots, the last one activates the kext and the system enters perfect

 

Before installing MyKextInstaller, I will install KDK_26.0_25A5349a.kdk and then throw the AppleHDA.kext file into KDK_26.0_25A5349a.kdk. Then I can call the MyKextInstaller file. We will get a system that comes from KDK_26.0_25A5349a.kdk, which is exactly the same as macOS 26.0 (25A5349a) version. It's a perfect match.

Spoiler

 

[arsradu]

For the last two betas, i didn’t bother with WEG off/on. I just kept it off. With MacPro7,1 i have no problem having a complete installation unattended. The only thing, and it could be just my case, and it could also be a bug with OC, is that when restarting to begin the installation, it doesn’t automatically choose the Installer option in the boot picker. Instead it selects the “EFI” for some reason. After manually selecting the correct one, everything goes smoothly until Desktop. On desktop, for the last two betas, looks like the interface is somehow bigger than my actual physical display. So it’s a tiny little bit cut off. But it’s only the login screen, and only after boot. It looks ok when you just lock the screen. 
Anyway, it’s ok otherwise. I’m guessing WEG might need an update or something so it can be used during the updates. 

Edited August 26, 2025 by arsradu

[kaoskinkae]

2 hours ago, arsradu said:

For the last two betas, i didn’t bother with WEG off/on. I just kept it off. With MacPro7,1 i have no problem having a complete installation unattended. The only thing, and it could be just my case, and it could also be a bug with OC, is that when restarting to begin the installation, it doesn’t automatically choose the Installer option in the boot picker. Instead it selects the “EFI” for some reason. After manually selecting the correct one, everything goes smoothly until Desktop. On desktop, for the last two betas, looks like the interface is somehow bugger than my actual phisical display. So it’s a tiny little bit cut off. But it’s only the login screen, and only after boot. It looks ok when you just lock the screen. 
Anyway, it’s ok otherwise. I’m guessing WEG might need an update or something so it can be used during the updates. 

Difference between my two computers NEW: and OLD: In the NEW: the process is quick and easy, in this latest beta I tried, in the 3rd I restart to test with the kext already active and I saved myself from having to activate it and log back into the system. In this computer the monitor appears active and you can work. In the second computer, the OLD: Here there is a problem with the monitor not working and staying in superposition, possibly due to using an Imacpro1.1 Once the system goes to sleep I know the update process is finished and all I have to do is reset and use a USB with the kext active and the process enters the system and allows me to modify my EFI and activate the kext. Let's hope that opencore or the kext adapt to this new problem with the official version or the RC

[Zevgoli]

Ok…so an update.  I was unable to use Apple wallpaper on the desktop but then I tried one of my own photos and that worked fine.  I was able to enable Bluetooth via setting kexts to true so now I have my Apple wireless keyboard connected.  I also have sound via external speakers.  Tahoe identifies my Intel graphics properly in system report which it didn't  before.  Wi-fi I don’t care about so I’m not going to bother to try and fix.  So the only problem I can see is that things still run quite slowly on the desktop.  If you try and reduce an open app like Mail or Safari it takes 15-20 seconds to happen.  Also opening an app can take some time.  However overall I can live with this till further improvements happen with OCLP in the form of a proper release down the road.

 

Cheers, Howard