Attempting to Disable Thunderbolt Extensions on Yosemite 10.10.5

I just started having this issue with my Mid-2014 15" Macbook Pro with Retina display, and I've tried refreshing a few processes and did a factory reset, but am still having the problem appear.

I've tried to disable the SIP to disable the Thunderbolt extensions, but it looks like that wasn't a thing until a later OS. Is there a way to circumvent this without having to go to Catalina? I'd prefer not to so I don't lose access to certain 32-bit applications, but if there are no other options, then there's not a whole lot I can do.

Thanks for the advice/help in advance!

Edit: I have tried the following:
-moved /System/Library/Extensions/AppleThunderboltNHI.kext to the desktop, which made a copy
-unlocked and logged in as root user
-went into terminal and used
kextunload /System/Library/Extensions/AppleThunderboltNHI.kext
-locked the root user back up and rebooted

Edit 2: Did the following:

• Opened Terminal on normal user login, used
  sudo kextcache -system-prelinked-kernel
• Entered password to confirm change, then:
  sudo kextcache -system-caches
• Rebooted.

Solution 1:

You don't need to disable SIP to remove the extensions. All you'll need is an Admin account for the Finder popup when you move the extensions out of the System folder.