This commit fixes T67312 for the "material preview", but as soon as I switch to "rendered" blender crashes.

This becomes too cumbersome. Can you join https://blender.chat/channel/support and ping me there ?

There was a typo (I fixed it 10 sec after posting, but you were quicker). Asuming your Blender.app in in /Applications :

/Applications/Blender.app/Contents/MacOS/Blender -d --debug-gpu --debug-gpu-shaders

Open the Terminal and run the following command - ajust the path if needed:

Related: T66584

I can confirm this bug on OSX 10.12.6

I cannot reproduce this on OSX 10.12.6

I cannot reproduce this on OSX 10.12.6

It's not the same error as T68604.

I cannot reproduce it on OSX 10.12.6

Not sure this is the only problem, but this is a simple example file for the crash:

I cannot reproduce this on OSX 10.12.6

After a closer look I was able to reproduce it (somehow) in the viewport with the file . See also my system specs above.

I cannot reproduce this on OSX 10.12.6. The textrure painting and floodfill feel slow, but zooming in and out works well enough. Could be related to the nvidia driver.

I cannot reproduce this on OSX 10.12.6

Is this related to T65714 ?

calculate the redraw in view_zoomdrag_invoke and at the same time allow the "zoom to mouse". This patch can be tested in the "shader editor" with the navigation zoom method set to "continuos zoom" (in the preferences) on a computer with a trackpad.

using a mouse and "continuous zoom modus" enabled, the vzd->timer_lastdraw gets updated until the modal exits but with a trackpad it never enters the modal state and vzd->timer_lastdraw is not not set.

so in the zip file you attached you have 5 files:
1 Cube aqua 2_79b.dae
2 Cube aqua 2_80 2019-07-04 Hash fdcfc263e973.dae
3 Cube aqua 2.80 2019-07-8 Hash a42cae160082.dae
4 Cube aqua 2.80 2019-07-9 Hash 3b4054cb586f.dae
5 Cube aqua 2.80 2019-07-10 Hash bb7b741d2f1c.dae

I tested the following cube in blender

open the file "Cube color materials 2_80 July 4 2019 last download.dae" in VSCodium, go to line 96, change the value from <float sid="alpha">1</float> to <float sid="alpha">0</float>, save the file. Does the priview in OSX Finder look as you expected ?

Download https://github.com/VSCodium/vscodium/releases/download/1.36.1/VSCodium.1.36.1.dmg , install it, open the dae file in VSCodium, change the value and save the dae file.

Not sure it helps, but change the value in that line from 1 to 0.

1. open "Cube texture July 8 2019.dae" from zip file in this ticket in a texteditor (vi, emacs, textmate, visual code studio, sublime, ...)
2. go to line 41
3. change: <float sid="alpha">1</float> to: <float sid="alpha">0</float>
4. save the file
5. check the finder if the preview of the file is correct

Are you use Macintosh yourself ?

Yes.

Let's talk about the issue, not emotions.

If I understand the ticket correctly the problem is the Preview and Quicklook function in the OSX Finder are not showing the exported object. After testing a few options I was able to make the object visible: Set the transparency value to 0 or remove the following lines in the dea file:

Thank you for the detailed report. I was able to reproduce it.

I cannot reproduce it on blender head. Any pinch zooming in the node editor or sidebar works well. Can you please try with the latest version ?