请问你的 Rhino 6 的具体版本是多少？
你可以在 Rhino 的指令行运行 SystemInfo 指令，然后把弹出内容保存后发上来看看。
版本是rhino for mac 6.31
内容：
Rhino 6 SR31 2020-11-10 (Public Build, 6.31.20315.17002, Git hash:master @ ff08c426b1ef7d3a1c50a01e5e87220a68a9f815)
License type: 教育版, 版本2020-11-10
License details: Cloud Zoo. In use by: LIN Yuhan ()
Apple Intel 64-bit macOS 版本10.15.6（版号19G2021） (Physical RAM: 64Gb)
Mac Model Identifier: MacBookPro16,4
Machine name: 林钰涵的MacBook Pro
Language: zh-Hans
AMD Radeon Pro 5600M OpenGL Engine (OpenGL ver:4.1 ATI-3.10.16)
OpenGL Settings
Safe mode: Off
Use accelerated hardware modes: On
Redraw scene when viewports are exposed: On
Anti-alias mode: 4x
Mip Map Filtering: Linear
Anisotropic Filtering Mode: Height
Vendor Name: ATI Technologies Inc.
Render version: 4.1
Shading Language: 4.10
Maximum Texture size: 16384 x 16384
Z-Buffer depth: n/a
Maximum Viewport size: 16384 x 16384
Total Video Memory: 8 GB
Graphics: AMD Radeon Pro 5600M
Displays: LG HDR 4K (163dpi 2x)
Graphics processors
Intel UHD Graphics 630 (1536 MB)
AMD Radeon Pro 5600M (8 GB)
Color LCD (1920 x 1080 @ 59 Hz)
LG HDR 4K (1920 x 1080 @ 30 Hz)
USB devices
Seagate: BUP Slim
VIA Labs, Inc. : USB3.0 Hub
Generic: USB3.0-CRW
VIA Labs, Inc. : USB Billboard Device
LG Electronics Inc.: USB Controls
Apple: composite_device
Apple Inc.: Touch Bar Backlight
Apple Inc.: Touch Bar Display
Apple Inc.: Apple Internal Keyboard / Trackpad
Apple: Headset
Apple Inc.: Ambient Light Sensor
Apple Inc.: FaceTime HD Camera (Built-in)
Apple Inc.: Apple T2 Controller
Bluetooth devices
Nordic Semiconductor:
Third party kernel extensions
None
Third party plugins
/usr/lib/swift/libswiftCore.dylib
/usr/lib/swift/libswiftCoreFoundation.dylib
/usr/lib/swift/libswiftCoreGraphics.dylib
/usr/lib/swift/libswiftDarwin.dylib
/usr/lib/swift/libswiftDispatch.dylib
/usr/lib/swift/libswiftFoundation.dylib
/usr/lib/swift/libswiftIOKit.dylib
/usr/lib/swift/libswiftObjectiveC.dylib
/usr/lib/swift/libswiftXPC.dylib
/usr/lib/swift/libswiftCryptoTokenKit.dylib
/usr/lib/swift/libswiftos.dylib
/Users/linyuhan/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/Twinmotion Direct Link 2020.2.rhp/libDLRhinoNative.dylib
/Users/linyuhan/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/Twinmotion Direct Link 2020.2.rhp/libPolygonCruncherSDK.dylib
/Users/linyuhan/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/Twinmotion Direct Link 2020.2.rhp/libSyncData.dylib
/Users/linyuhan/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/Twinmotion Direct Link 2020.2.rhp/libomp.dylib
/Users/linyuhan/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/Twinmotion Direct Link 2020.2.rhp/libc++.1.dylib
/usr/lib/log/liblog_network.dylib
Rhino plugins
/Applications/Rhinoceros.app/Contents/PlugIns/PanelingTools.rhp “PanelingTools” 6.31.20315.1002
/Applications/Rhinoceros.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/GrasshopperPlugin.rhp “Grasshopper” 6.31.20315.17002
/Applications/Rhinoceros.app/Contents/PlugIns/AnimationTools.rhp “AnimationTools” 6.31.20315.1002
/Users/linyuhan/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/Twinmotion Direct Link 2020.2.rhp “Twinmotion Direct Link 2020” 1.0.6.0
/Applications/Rhinoceros.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoDLR_Python.rhp “IronPython” 6.31.20315.17002
/Applications/Rhinoceros.app/Contents/PlugIns/export_3DS.rhp “3D Studio Export” 6.31.20315.1002
/Applications/Rhinoceros.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/Commands.rhp “Commands” 6.31.20315.17002
/Applications/Rhinoceros.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/Export_OBJ.rhp “export_OBJ” 6.31.20315.17002
/Applications/Rhinoceros.app/Contents/PlugIns/NamedSnapshots.rhp “Snapshots” 6.31.20315.1002
/Applications/Rhinoceros.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RDK_EtoUI.rhp “RDK_EtoUI” 6.31.20315.17002
/Applications/Rhinoceros.app/Contents/PlugIns/export_ACAD.rhp “AutoCAD file export : export_ACAD” 6.31.20315.1002
/Applications/Rhinoceros.app/Contents/PlugIns/Displacement.rhp “Displacement” 6.31.20315.1002
/Applications/Rhinoceros.app/Contents/Frameworks/RhMaterialEditor.framework “Renderer Development Kit” 6.31.20315.1002
/Applications/Rhinoceros.app/Contents/PlugIns/RhinoRender.rhp “Rhino Render” 6.31.20315.1002
/Applications/Rhinoceros.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoCycles.rhp “RhinoCycles” 6.31.20315.17002
请问各位老师对这种情况有判断吗 今天刚更新了6.23 但是还是无法导出obj格式
抱歉晚回复，麻烦你执行再指令行执行一下 PluginManager, 然后在弹出窗口里面找下 Export_OBJ, 看是否又被勾选运行，如果没有请勾选，然后重启Rhino试试
麻烦问是保存所有的文件为 Obj 都会出错吗？还只是个别文件？
我这边测试了也没有问题，看起来好像你是往移动设备上去保存的，请先确认是否有写入权限。或者先试着保存到桌面上，再复制到移动设备测试一下。
所有的都这样 
是的是的存在桌面就没有这个问题！！太感谢老师了！请问您知道如何调整硬盘写入权限吗 我以前似乎没有遇到这种状况
通常是磁盘格式的问题，比如 Windows 的 NTFS 格式，Mac 不能往 NTFS 格式的磁盘上写如数据。通用的磁盘格式 exFAT 格式同时支持 Mac 和 Windows 写入，但读写效率会比较低。
好的好的了解了！再次谢谢两位老师！