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Fix for Slow Boot on Thunderbolt 2.0 Motherboards

tonymacx86

Administrator
Staff member
Joined
Nov 18, 2009
Messages
8,740
Motherboard
PRIME Z490-A
CPU
i5 10600K
Graphics
Vega 56
Mac
  1. MacBook Air
Classic Mac
  1. Apple
  2. PowerBook
Mobile Phone
  1. iOS
Problem:
If you have a Thunderbolt 2.0 motherboard, such as the Gigabyte Z87X-UD7-TH, there is a boot time delay of 45 seconds or so when Thunderbolt peripherals are attached.

Solution:
For Chimera/Chameleon, delete /System/Library/Extensions/AppleThunderboltNHI.kext, rebuild cache and reboot.

1. Open Terminal
2. Type the following and enter password:

Code:
sudo -s

Code:
cp -R /System/Library/Extensions/AppleThunderboltNHI.kext ~/Desktop

Code:
rm -R /System/Library/Extensions/AppleThunderboltNHI.kext

Code:
touch /System/Library/Extensions

3. Reboot system, and the delay is gone!

Thanks to Genzai in the Thunderbolt 2.0 Testing thread here. :thumbup:
 
Joined
Feb 11, 2011
Messages
46
Motherboard
Asus P8Z77-I
CPU
I5-2500K
Graphics
GTX 660 TI
Mac
  1. MacBook
Mobile Phone
  1. iOS
Problem:
If you have a Thunderbolt 2.0 motherboard, such as the Gigabyte Z87X-UD7-TH, there is a boot time delay of 45 seconds or so when Thunderbolt peripherals are attached.

Solution:
For Chimera/Chameleon, delete /System/Library/Extensions/AppleThunderboltNHI.kext, rebuild cache and reboot.

1. Open Terminal
2. Type the following and enter password:

Code:
sudo -s

Code:
cp -R /System/Library/Extensions/AppleThunderboltNHI.kext ~/Desktop

Code:
rm -R /System/Library/Extensions/AppleThunderboltNHI.kext

Code:
touch /System/Library/Extensions

3. Reboot system, and the delay is gone!

Thanks to Genzai in the Thunderbolt 2.0 Testing thread here. :thumbup:

Is their a way to do this without removing thunderbolt support from OSX?
 
Joined
Jul 19, 2012
Messages
1,835
Motherboard
B450M-DS3H
CPU
Ryzen 5 2600
Graphics
RX 590
Mac
  1. MacBook Air
Mobile Phone
  1. iOS
Is their a way to do this without removing thunderbolt support from OSX?

Would this really be a fix if it removed thunderbolt functionality? Thunderbolt support isn't being removed and I suggest you read the linked thread to understand it better.
 
Joined
Aug 19, 2010
Messages
526
Motherboard
GA-Z390 Designare
CPU
i7 9900K
Graphics
UHD630 & Radeon VII
Mac
  1. MacBook Air
  2. MacBook Pro
  3. Mac mini
  4. Mac Pro
Mobile Phone
  1. iOS
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