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Took that as an opportunity to test my Amfeltec setup with 4x780Ti. Thus far, no luck, still produces kernel panics.

Using OS X 10.11.1 with the latest NVidia alternate drivers GPU 346.03.03f02 and CUDA 7.5.21.

Rendering using built-in 680 card works. Rendering using any (even a single one) of the external 780Ti's causes kernel panic, relevant section here if anyone can help locate/prevent this from happening. All small test scenes that worked fine on OS X 10.8.5 with this same hardware setup. Any hints anyone?

Kernel Extensions in backtrace:
com.nvidia.web.NVDAResmanWeb(10.0.7)[53A7D683-CD5C-3EDD-A58E-5BB7FF28BDE9]@0xffffff7f84b80000->0xffffff7f84e56fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[8E5F549E-0055-3C0E-93F8-E872A048E31B]@0xffffff7f8473e000
dependency: com.apple.iokit.IONDRVSupport(2.4.1)[814A7F4B-03EF-384A-B205-9840F0594421]@0xffffff7f84b6a000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[48AC8EA9-BD3C-3FDC-908D-09850215AA32]@0xffffff7f84b23000
dependency: com.apple.AppleGraphicsDeviceControl(3.11.33b1)[2BA0BB49-9DFD-3851-984F-8816AE3A1964]@0xffffff7f84b7a000
com.nvidia.web.NVDAGK100HalWeb(10.0.7)[986E98FA-AE87-31F2-8504-CD8D83F6C98E]@0xffffff7f84e66000->0xffffff7f85012fff
dependency: com.nvidia.web.NVDAResmanWeb(10.0.7)[53A7D683-CD5C-3EDD-A58E-5BB7FF28BDE9]@0xffffff7f84b80000
dependency: com.apple.iokit.IOPCIFamily(2.9)[8E5F549E-0055-3C0E-93F8-E872A048E31B]@0xffffff7f8473e000

BSD process name corresponding to current thread: kernel_task
Boot args: nvda_drv=1

Mac OS version:
15B42

Kernel version:
Darwin Kernel Version 15.0.0: Sat Sep 19 15:53:46 PDT 2015; root:xnu-3247.10.11~1/RELEASE_X86_64
Kernel UUID: AB5FC1B4-12E7-311E-8E6F-9023985D8C1D
Kernel slide: 0x0000000003c00000
Kernel text base: 0xffffff8003e00000
__HIB text base: 0xffffff8003d00000
System model name: MacPro5,1 (Mac-F221BEC8)

Hi,
have you seen this other discussion:
viewtopic.php?f=14&t=51192
unfortunately I have no more a mac with thunderbolt for testing by myself
ciao beppe

balt wrote:Took that as an opportunity to test my Amfeltec setup with 4x780Ti. Thus far, no luck, still produces kernel panics.

Using OS X 10.11.1 with the latest NVidia alternate drivers GPU 346.03.03f02 and CUDA 7.5.21.

Rendering using built-in 680 card works. Rendering using any (even a single one) of the external 780Ti's causes kernel panic, relevant section here if anyone can help locate/prevent this from happening. All small test scenes that worked fine on OS X 10.8.5 with this same hardware setup. Any hints anyone?

Kernel Extensions in backtrace:
com.nvidia.web.NVDAResmanWeb(10.0.7)[53A7D683-CD5C-3EDD-A58E-5BB7FF28BDE9]@0xffffff7f84b80000->0xffffff7f84e56fff
dependency: com.apple.iokit.IOPCIFamily(2.9)[8E5F549E-0055-3C0E-93F8-E872A048E31B]@0xffffff7f8473e000
dependency: com.apple.iokit.IONDRVSupport(2.4.1)[814A7F4B-03EF-384A-B205-9840F0594421]@0xffffff7f84b6a000
dependency: com.apple.iokit.IOGraphicsFamily(2.4.1)[48AC8EA9-BD3C-3FDC-908D-09850215AA32]@0xffffff7f84b23000
dependency: com.apple.AppleGraphicsDeviceControl(3.11.33b1)[2BA0BB49-9DFD-3851-984F-8816AE3A1964]@0xffffff7f84b7a000
com.nvidia.web.NVDAGK100HalWeb(10.0.7)[986E98FA-AE87-31F2-8504-CD8D83F6C98E]@0xffffff7f84e66000->0xffffff7f85012fff
dependency: com.nvidia.web.NVDAResmanWeb(10.0.7)[53A7D683-CD5C-3EDD-A58E-5BB7FF28BDE9]@0xffffff7f84b80000
dependency: com.apple.iokit.IOPCIFamily(2.9)[8E5F549E-0055-3C0E-93F8-E872A048E31B]@0xffffff7f8473e000

BSD process name corresponding to current thread: kernel_task
Boot args: nvda_drv=1

Mac OS version:
15B42

Kernel version:
Darwin Kernel Version 15.0.0: Sat Sep 19 15:53:46 PDT 2015; root:xnu-3247.10.11~1/RELEASE_X86_64
Kernel UUID: AB5FC1B4-12E7-311E-8E6F-9023985D8C1D
Kernel slide: 0x0000000003c00000
Kernel text base: 0xffffff8003e00000
__HIB text base: 0xffffff8003d00000
System model name: MacPro5,1 (Mac-F221BEC8)

Roll back coda drivers

nah mate, it's working: viewtopic.php?f=14&t=51554&p=256954#p256954