Rhino 8 and 9 are nearly unusable on Mac OS

Rhino Rhino for Mac
1

I am running Version 8 (8.30.26103.11002, 2026-04-13) as well as the latest Version 9 WIP. And, both of them, regardless of what I am doing hang up every time a single command is executed.

For example, if I create a circle, it immediately gives me the spinning wheel, before I can run another command. Even one as simple as copy or scale.

I am running a Macbook Pro with an M1 Max with 64GB of memory and the latest Mac OS 26.3.1

It’s basically unusable at this point and I need to fix it or move on beyond Rhino. I see others mentioning it on the forums, but with no resolution. Please tell me the devs are aware of it and working on it.

Thanks,

Jordan

2

Hi Jordan, Please run SystemInfo in the Rhino command line and post the results. I suspect you may have some incompatible plugins.

3

@Japhy here are the results. But, both version 8 and the WIP are running without any plugins installed, other than whatever is packaged with the installer. I only use Rhino as a modeler.

Rhino 9 SR0 2026-4-28 (Rhino WIP, 9.0.26118.12306, Git hash:master @ f747d8da411cf1d70538fcd21c9bfcf397fe947a)
License type: Commercial, build 2026-04-28
License details: Cloud Zoo
Expires on: 2026-06-12

Apple macOS Version 26.3.1 (a) (Build 25D771280a) (Physical RAM: 64GB)
Mac Model Identifier: MacBookPro18,2
Language: en-US (MacOS default)
.NET 10.0.2

Metal GPU Family Apple 7
Metal GPU Family Common 3
Metal GPU Family Mac 2
Graphics processors
Apple M1 Max
Dell U4919DW (5120 x 1440 @ 60.00Hz)
GPU Vendor: Apple

USB devices
Texas Instruments Inc: TPS DMC Family
CalDigit,Inc.: CalDigit TS4 Audio - Rear
Elgato: Stream Deck Mini
CalDigit, Inc: TS4 USB3.2 Gen2 HUB
CalDigit, Inc: TS4 USB3.2 Gen2 HUB

Bluetooth devices
None

Third party kernel extensions
None

Third party plugins
/usr/lib/swift/libswiftCore.dylib
/usr/lib/swift/libswiftObjectiveC.dylib
/usr/lib/swift/libswiftCoreFoundation.dylib
/usr/lib/swift/libswiftDarwin.dylib
/usr/lib/swift/libswiftDispatch.dylib
/usr/lib/swift/libswiftIOKit.dylib
/usr/lib/swift/libswiftSystem.dylib
/usr/lib/swift/libswiftXPC.dylib
/usr/lib/swift/libswift_Builtin_float.dylib
/usr/lib/swift/libswift_Concurrency.dylib
/usr/lib/swift/libswift_DarwinFoundation1.dylib
/usr/lib/swift/libswift_StringProcessing.dylib
/usr/lib/swift/libswiftos.dylib
/usr/lib/swift/libswiftDistributed.dylib
/usr/lib/swift/libswiftObservation.dylib
/usr/lib/swift/libswiftSynchronization.dylib
/usr/lib/swift/libswiftAccelerate.dylib
/usr/lib/swift/libswiftCoreAudio.dylib
/usr/lib/swift/libswiftCoreMedia.dylib
/usr/lib/swift/libswiftMetal.dylib
/usr/lib/swift/libswiftOSLog.dylib
/usr/lib/swift/libswiftQuartzCore.dylib
/usr/lib/swift/libswiftUniformTypeIdentifiers.dylib
/usr/lib/swift/libswiftVideoToolbox.dylib
/usr/lib/swift/libswiftsimd.dylib
/usr/lib/swift/libswift_RegexParser.dylib
/usr/lib/swift/libswiftCoreImage.dylib
/usr/lib/swift/libswiftCoreMIDI.dylib
/usr/lib/swift/libswift_DarwinFoundation2.dylib
/usr/lib/swift/libswift_DarwinFoundation3.dylib
/usr/lib/swift/libswiftCompression.dylib
/usr/lib/swift/libswiftCoreLocation.dylib
/usr/lib/swift/libswiftRegexBuilder.dylib
/usr/lib/swift/libswiftAVFoundation.dylib
/usr/lib/swift/libswiftNaturalLanguage.dylib
/usr/lib/swift/libswiftMLCompute.dylib
/usr/lib/swift/libswiftCoreGraphics.dylib
/usr/lib/swift/libswiftFoundation.dylib
/usr/lib/swift/libswiftSwiftOnoneSupport.dylib
/usr/lib/swift/libswiftsys_time.dylib
/usr/lib/swift/libswiftSpatial.dylib
/usr/lib/usd/libusd_ms.dylib
/usr/lib/swift/libswift_errno.dylib
/usr/lib/swift/libswiftIntents.dylib
/usr/lib/swift/libswiftCoreMediaIO.dylib
/usr/lib/swift/libswiftCallKit.dylib
/usr/lib/swift/libswiftPassKit.dylib
/usr/lib/swift/libswiftAppleArchive.dylib
/usr/lib/updaters/libAppleTconUARPUpdater.dylib
/usr/lib/updaters/libT200Updater.dylib
/usr/lib/swift/libswiftDemangle.dylib
/usr/lib/swift/libswiftGLKit.dylib
/usr/lib/swift/libswiftMetalKit.dylib
/usr/lib/swift/libswiftModelIO.dylib
/usr/lib/swift/libswiftSceneKit.dylib
/usr/lib/swift/libswiftExtensionFoundation.dylib
/usr/lib/swift/libswiftGameplayKit.dylib
/usr/lib/swift/libswiftSpriteKit.dylib
/usr/lib/swift/libswiftMapKit.dylib

Rhino plugins that do not ship with Rhino

Rhino plugins that ship with Rhino
/Applications/RhinoWIP.app/Contents/Frameworks/RhMaterialEditor.framework “Renderer Development Kit” 9.0.26118.1002
/Applications/RhinoWIP.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/Commands.rhp “Commands” 9.0.26118.12306
/Applications/RhinoWIP.app/Contents/PlugIns/NamedSnapshots.rhp “Snapshots” 9.0.26118.1002
/Applications/RhinoWIP.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RDK_EtoUI.rhp “RDK_EtoUI” 9.0.26118.12306
/Applications/RhinoWIP.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/MeshCommands.rhp “MeshCommands” 9.0.26118.12306
/Applications/RhinoWIP.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoRenderCycles.rhp “Rhino Render” 9.0.26118.12306
/Applications/RhinoWIP.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoCycles.rhp “RhinoCycles” 9.0.26118.12306
/Applications/RhinoWIP.app/Contents/PlugIns/SectionTools.rhp “SectionTools” 9.0.26118.1002
/Applications/RhinoWIP.app/Contents/PlugIns/Displacement.rhp “Displacement” 9.0.26118.1002
/Applications/RhinoWIP.app/Contents/PlugIns/export_STL.rhp “STL Export” 9.0.26118.1002
/Applications/RhinoWIP.app/Contents/PlugIns/PanelingTools.rhp “PanelingTools” 9.0.26118.1002
/Applications/RhinoWIP.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoDLR_Python.rhp “IronPython” 9.0.26118.12306
/Applications/RhinoWIP.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/GrasshopperPlugin.rhp “Grasshopper” 9.0.26118.12306
/Applications/RhinoWIP.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoCodePlugin.rhp “RhinoCodePlugin” 9.0.26118.12306

4

You are seeing lags in both versions with blank files or is this happening in particular files?

5

@Japhy I am seeing it in both versions with blank files. So, if I open a new blank file, run a command, like a simple circle, it then does the spinning hangup.

6

Thanks, I think we will need to start looking anti-virus software as well as hardware peripherals.

Lets unplug all these and reboot your mac

7

Hi Jordan. Kindly try these:

  • Try plugging the Dell display directly into the MacBook’s HDMI or Thunderbolt port (bypassing the CalDigit). MacOS occasionally struggles with “Metal” GPU timeouts when high-resolution displays are driven through a dock.
  • Try to set the GPU Tessellation to OFF under OPTIONS > VIEW > OpenGL.
  • Try closing the Stream Deck software and unplug the USB hub to see if the issue persists in a “naked” hardware environment.

Hope you would get rid of the issue shortly.

8

Thanks for the suggestions. I run my display via DisplayPort, but I will have to get a DisplayPort to USB C cable to connect directly.

As for the GPU tessellation suggestion, I don’t see that in the options. But, I believe Apple doesn’t really use this anymore. I may be incorrect.

I’ve killed the stream deck application and disconnected it, but I will note I had this issue before I started using a streamdeck.

9

Hi Jordan -

Japhy’s suggestion was to completely disconnect all peripherals and only use the screen of your MBP.
-wim

10

Have you tried to run Rhino in Safe Mode by pressing Shift while launching Rhino?

Also, if I’m not mistaken, Rhino is developed by using .NET 8 and your system is showing .NET 10 is installed. If anyone could confirm this, then you may want to try to downgrade to .NET 8.

Edit: also, lowering resolution seems worth to try as well on ultra wide display.

11

Rhino WIP runs in net 10.

12

Thanks for clarifying this :folded_hands:t3:

13

Hello! Sorry for the late response, I’ve been away for awhile and haven’t had a chance to revisit this. I will try running in safe mode!