# RTX on Mac with Distributed Rendering

**URL:** <https://forums.chaos.com/t/rtx-on-mac-with-distributed-rendering/115143>\
**Category:** Requests\
**Created:** [May 22, 2023, 1:06am UTC](https://forums.chaos.com/t/rtx-on-mac-with-distributed-rendering/115143 "2023-05-22T01:06:38Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jd\_morani](https://avatars.discourse-cdn.com/v4/letter/j/898d66/32.png) [@jd\_morani](https://forums.chaos.com/u/jd_morani)\
**Post date:** [May 22, 2023, 1:06am UTC](https://forums.chaos.com/t/rtx-on-mac-with-distributed-rendering/115143/1 "2023-05-22T01:06:38Z")

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Hi,

I’m pretty sure I used to be able to select V-Ray GPU with RTX mode on my Mac for Distributed rendering when setting the _VRAY\_MAC\_GPU environment variable (I run a Apple Silicon Mac Studio Ultra)._  
Unfortunately, with the latest version of V-Ray for Maya (6.0 Update 1), if I pick RTX, it always fallback to CUDA on the Windows machine I use as server for rendering.  
Any chance to allow RTX mode from a Mac? That is a killer feature for Macs out there that can’t use Nvidia cards.

Thanks

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**Author:** ![vladimir\_krastev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/vladimir_krastev/32/42177_2.png) [@vladimir\_krastev](https://forums.chaos.com/u/vladimir_krastev)\
**Post date:** [June 5, 2023, 9:59am UTC](https://forums.chaos.com/t/rtx-on-mac-with-distributed-rendering/115143/2 "2023-06-05T09:59:04Z")

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Hi, this issue has been progressing trough the ticketing system.  
V-Ray GPU macOS devices is no longer supported by default. The advanced users can bring back the old behaviour by using this environment variable **VRAY\_MAC\_GPU** with a value **1**  
​​Do that at your own risk!​

ThIs setup works for distributed rendering as tested in our office.

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<div class="post-metadata">

**Author:** ![jd\_morani](https://avatars.discourse-cdn.com/v4/letter/j/898d66/32.png) [@jd\_morani](https://forums.chaos.com/u/jd_morani)\
**Post date:** [June 7, 2023, 2:16am UTC](https://forums.chaos.com/t/rtx-on-mac-with-distributed-rendering/115143/3 "2023-06-07T02:16:03Z")

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I know but the problem is that even with this environment variable (which I have already set), no matter whether I pick RTX or CUDA, it always fallback to CUDA on the server side. I would love to take full advantage of my RTX 4090 via distributed rendering from the Mac.

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<div class="post-metadata">

**Author:** ![vladimir\_krastev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/vladimir_krastev/32/42177_2.png) [@vladimir\_krastev](https://forums.chaos.com/u/vladimir_krastev)\
**Post date:** [June 9, 2023, 12:05pm UTC](https://forums.chaos.com/t/rtx-on-mac-with-distributed-rendering/115143/4 "2023-06-09T12:05:40Z")

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Hi if you can see the GPU settings in Maya on your Mac then the environment variable is working. From there you have to choose RTX and remove the Mac from the distributed rendering list (disable “use local machine” checkbox) before sending the job.

 ![maya_2023-06-09_15-03-18.jpg](https://europe1.discourse-cdn.com/chaosprd/original/3X/e/9/e9eee8abd2f381974fffee750429ff640d0ae3e8.jpeg)