All materials show as white image

I’ve just loaded rhino Mac trial on an iMac to pull out some renderings because my MacBook isn’t strong enough.
The model has transferred fine with all previous elements showing correct on the rendered view and in test render but any new objects with new materials show as white.
The image preview in Render Content files all show the desired material as a texture but as soon as it is loaded into rhino the texture image is lost and the ‘ball preview’ show as white.

Image 1-Material previously in file has loaded and link correctly
Image 2-White ‘ball preview’ instead of old smokey bricks
Image 3-Render Content file displaying all textures correctly

Rhino 7 SR6 2021-5-7 (Rhino 7, 7.6.21127.19002, Git hash:master @ aec74c050f3ca28ab3cfd6882e9453a52366a9b7)
License type: Evaluation, build 2021-05-07
License details: Stand-Alone
Expires on: 2021-08-29

Apple Intel 64-bit macOS Version 11.2.3 (Build 20D91) (Physical RAM: 64Gb)
Mac Model Identifier: iMac20,2
Language: en-GB (MacOS default)

AMD Radeon Pro 5700 OpenGL Engine (OpenGL ver:4.1 ATI-4.2.15)

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: 8176 MB
Graphics: AMD Radeon Pro 5700
Displays: iMac (217dpi 2x)

Graphics processors
AMD Radeon Pro 5700 (8 GB)
iMac (2560 x 1440)

USB devices
Logitech: USB Receiver
Apple: Headset
Apple Inc.: Ambient Light Sensor
Apple Inc.: FaceTime HD Camera (Built-in)
Apple Inc.: Apple T2 Controller

Bluetooth devices
Broadcom: Magic Keyboard

Third party kernel extensions

Hi @edc0125 Can you use the Export command with a few objects selected that have materials applied but do not show up for you? Make sure Save Textures is checked in the Export window. My first guess is that this Mac is not allowing Rhino to communicate with the internet to download the new textures in newly assigned materials. A command you could try to test this is DownloadLibraryTextures that will grab them all at once. If it fails the command line messages at the bottom left of the UI will say so.