Disappearing lines when zooming in

I’m on a iMac (Retina 5K, 27-inch, 2017) Monterey 12.6.3 i’ve started to notice the curves disappearing when i zoom in , i’ve freshly installed rhino with no change. see attached video.

Hi Jon -
Please run the Rhino SystemInfo command and copy-paste the result here.
-wim

this should happen in perspective views only, because view target point gets out of sight.
have you tried zoom - selection?

Rhino 7 SR27 2023-2-1 (Rhino 7, 7.27.23032.13002, Git hash:master @ 4a0030c0d354560df03764f4f49ecc5d119e5118)
License type: Commercial, build 2023-02-01
License details: Cloud Zoo

Apple macOS Version 12.6.3 (Build 21G419) (Physical RAM: 32Gb)
Mac Model Identifier: iMac18,3
Language: en-GB (MacOS default)

AMD Radeon Pro 580 OpenGL Engine (OpenGL ver:4.1 ATI-4.8.101)

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: High

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: Radeon Pro 580
Displays: iMac (217dpi 2x), HP 27f (82dpi 1x)

Graphics processors
Radeon Pro 580 (8 GB)
iMac (2560 x 1440)
HP 27f (1920 x 1080 @ 60.00Hz)

USB devices
Realtek: USB 10/100/1000 LAN
Samsung M3 Portable: Samsung M3 Portable
VIA Labs, Inc.: USB2.0 Hub
Broadcom Corp.: Bluetooth USB Host Controller
Apple Inc.: FaceTime HD Camera (Built-in)
Hewlett-Packard: HP LaserJet M402n
Apple Inc.: Apple MagSafe Charger

Bluetooth devices
None

Third party kernel extensions
com.parallels.kext.hypervisor (15.1.5 47309) E58BB0E4-8BF0-3734-AFEB-45B878C474C3
com.parallels.kext.netbridge (15.1.5 47309) 87C1BA53-76C0-360B-AE9D-FF2471FA4915
com.parallels.kext.vnic (15.1.5 47309) E7D58CD0-47AE-36DF-8289-3E550B76CCCB
com.parallels.kext.usbconnect (15.1.5 47309) B61070B1-5096-3B17-ADA1-D0EB011D4AB1

Third party plugins
/usr/lib/swift/libswiftCloudKit.dylib
/usr/lib/swift/libswiftCore.dylib
/usr/lib/swift/libswiftCoreData.dylib
/usr/lib/swift/libswiftCoreFoundation.dylib
/usr/lib/swift/libswiftCoreGraphics.dylib
/usr/lib/swift/libswiftCoreLocation.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/libswiftos.dylib
/usr/lib/swift/libswift_Concurrency.dylib
/usr/lib/swift/libswiftAppKit.dylib
/usr/lib/swift/libswiftCoreImage.dylib
/usr/lib/swift/libswiftMetal.dylib
/usr/lib/swift/libswiftQuartzCore.dylib
/usr/lib/swift/libswiftCryptoTokenKit.dylib
/usr/lib/swift/libswiftContacts.dylib
/usr/lib/swift/libswiftAccelerate.dylib
/usr/lib/swift/libswiftCoreAudio.dylib
/usr/lib/swift/libswiftCoreML.dylib
/usr/lib/swift/libswiftCoreMedia.dylib
/usr/lib/swift/libswiftOSLog.dylib
/usr/lib/swift/libswiftVision.dylib
/usr/lib/swift/libswiftsimd.dylib
/usr/lib/swift/libswiftNetwork.dylib
/usr/lib/swift/libswiftDemangle.dylib
/usr/lib/swift/libswiftFileProvider.dylib
/usr/lib/swift/libswiftIntents.dylib
/usr/lib/swift/libswiftPrivate_BiomePubSub.dylib
/usr/lib/swift/libswiftPrivate_BiomeStreams.dylib
/usr/lib/swift/libswiftUniformTypeIdentifiers.dylib
/usr/lib/swift/libswiftAVFoundation.dylib
/usr/lib/swift/libswiftCoreMIDI.dylib
/Users/jc/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/DatasmithRhino7.rhp/DatasmithFacadeCSharp.dylib
/Users/jc/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/KeyShot10Rhino7Plugin.rhp/libkeyshot_rhino_plugin.dylib

Rhino plugins that do not ship with Rhino
/Users/jc/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/DatasmithRhino7.rhp “Datasmith Exporter” 4.27.2.0
/Users/jc/Library/Application Support/McNeel/Rhinoceros/MacPlugIns/KeyShot10Rhino7Plugin.rhp “KeyShot10RhinoPlugin” 1.2.0.0

Rhino plugins that ship with Rhino
/Applications/Rhino 7.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoCycles.rhp “RhinoCycles” 7.27.23032.13002
/Applications/Rhino 7.app/Contents/PlugIns/NamedSnapshots.rhp “Snapshots” 7.27.23032.1002
/Applications/Rhino 7.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/GrasshopperPlugin.rhp “Grasshopper” 7.27.23032.13002
/Applications/Rhino 7.app/Contents/PlugIns/PanelingTools.rhp “PanelingTools” 7.27.23032.1002
/Applications/Rhino 7.app/Contents/PlugIns/AnimationTools.rhp “AnimationTools” 7.27.23032.1002
/Applications/Rhino 7.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/Commands.rhp “Commands” 7.27.23032.13002
/Applications/Rhino 7.app/Contents/PlugIns/SolidTools.rhp “SolidTools” 7.27.23032.1002
/Applications/Rhino 7.app/Contents/Frameworks/RhMaterialEditor.framework “Renderer Development Kit” 7.27.23032.1002
/Applications/Rhino 7.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RDK_EtoUI.rhp “RDK_EtoUI” 7.27.23032.13002
/Applications/Rhino 7.app/Contents/PlugIns/Displacement.rhp “Displacement” 7.27.23032.1002
/Applications/Rhino 7.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoRenderCycles.rhp “Rhino Render” 7.27.23032.13002
/Applications/Rhino 7.app/Contents/Frameworks/RhCore.framework/Resources/ManagedPlugIns/RhinoDLR_Python.rhp “IronPython” 7.27.23032.13002
/Applications/Rhino 7.app/Contents/PlugIns/RhinoRender.rhp “Legacy Rhino Render” 7.27.23032.1002

Thanks for the SystemInfo, Jon.
I’m not seeing such behavior on my older MacBook Air running the same version of macOS. Could you disable the 3rd party plug-ins, restart Rhino, and see if that makes a difference?
-wim