I am sorry I forget to give link for you.
Bugs Bunny model link

I can confirm that the preview does not work on macOS 10.15 Beta with blender 2.80

Allright. I mean right now Mojave 10.14.6
I will do that on MacOS 10.15 beta and send feedback assistant.app to apple build developers very soon.

Related: T66584

I am still wait for you to fix collada (.dae) for Blender 2.81 beta.
Blender 2.81 on date September 8, 2019 already and I am still wait for you.

I'm using blender 2.81 & 2.80 latest build for Mac 10.15.2 & just realized Collada import .dae is missing, is this issue ever got resolved ?

@MICHAEL JEAN BAPTISTE (fhqgroup) please stay on topic. if you cannot find the collada import in blender, please ask on https://blender.chat/channel/support or file a separate ticket on the bugtracker.

This link https://blender.chat/channel/support not work on Google Chrome.app for iMac plus Safari.app on my iPad Pro doesn't appear.
@MICHAEL JEAN BAPTISTE (fhqgroup) need to ask @Gaia Clary (gaiaclary) She work this here too. That is NOT separate bugtracker.
I am use Macintosh.
@MICHAEL JEAN BAPTISTE (fhqgroup) Do you have your own Macintosh?

Ah gosh - you actually need to go to https://blender.chat first and then select the support channel. Always nice to find a new unrelated bug :-).

@Jean First (robbott) Are you sure this link https://blender.chat support with @Gaia Clary (gaiaclary) ?
Collada what @Gaia Clary (gaiaclary) work on code.
@Jean First (robbott) Are you use your own Macintosh?

The collada importer is available from File -> Import -> Collada I am not aware of that it is disabled. I tested with a fresh build from this morning on Windows. So, maybe something has gone wrong with the latest builds for Mac ?

@Kent Davis (mac4kent) I am so sorry, but i am not able to understand what you mean :( i believe this issue is fixed since a long time.

@Kent Davis (mac4kent) this is a bug tracker, not a discussion forum. I do not have anything to add to this topic.
@Gaia Clary (gaiaclary) please close this ticket, if you think this issue is solved.

@Jean First (robbott) @Gaia Clary (gaiaclary) I have installed Blender 2.79b 2018-03-22 14:10, and it was available there, File -> Import ->Collada , i then close the application & opened Blender 2.81a & the Collada import appears there as well, i was able to locate the file at "/Applications/Blender.app/Contents/Resources/2.81/scripts/presets/operator/wm.collada_export".
i have no idea if the file was there before i installed Blender 2.79 but after running it, it became available in 2.81a & 2.80.
i have also witness in the past, some addon that will not work in 2.81a, after installing it 2.80, then copied .py file in 2.81a addon folder, it surprisingly work.
Mac OS 10.15.2
running Blender on external display through Radeon Pro 580 8 GB
(last year while running 2.80 beta version, some function wouldn’t be available while running blender on a external display through external graphics card, but when run on local display, those same functions will work, in my case I'm not sure if its Mac or the fact I'm running it on a external display through external graphics card )

@MICHAEL JEAN BAPTISTE (fhqgroup)
I prove you https://builder.blender.org/download/
Download on 2.82 beta and 2.83 Alpha to create new cube and export collada (.dae) after 3 materials color and other 3 texture (UV Wrap)

@Gaia Clary (gaiaclary) Yes I was busy with my son for a while until he sleep. I will processing on Blender 2.82beta and 2.83 Alpha.

@Gaia Clary (gaiaclary) , @MICHAEL JEAN BAPTISTE (fhqgroup) , @Jean First (robbott)
I let you know. There have materials same bug of texture.
I did (Edit > External Data > Pack All Into .blend) complete
FirestormOS-64.app
Catalina MacOS 10.15.x
Finder: Preview look good.
Blender 2.82 Beta bad bug worse on .dae left side cube.
Blender 2.83 Alpha less bug on .dae right side cube.
picture OSGrid FirestormOS-64.app link
picture Blender version link

As far as i can tell all of the collada files which you provide in your zip file are fully OK.

• I imported each of them to open3mod for inspection (worked)
• I imported each of them into Secondlife using the default SL-Viewer (Worked)
• I imported each of them back int Blender (worked)
• I checked the dae files for any possible issues (I found nothing wrong)
• I looked for oddities and found that your materials have names starting with numbers. This is a potential problem. However Blender takes care to use correct collada naming conventions so this is not an error, just an odd naming.

You may try to use material names which start with characters ('a-z, A-Z') and have no special characters in their name. It may be so that your importer has an issue with that.

Furthermore i asked you in my previous post to :

• Provide a clear description of the issue (you again only provided a "does not work" description without helpful hints)
• Indication what in the dae file is wrong (you did not do that)
• indication how it should be correct (you did not do that)

Since this issue is closed and i repeatedly verified that there is nothing wrong, i beg you to no longer post into this issue.

Again: Your collada files can be imported into 3 independent tools without error. Maybe you can ask the creator of your Firestorm viewer why they can not handle your collada files. If you want more help from here, then tell us what is bad in the collada files and how it should be changed for your situation. Only then we can decide how to proceed.

I put over start again create everything and put text a-z A-Z on materials one, two, three, four, five, six still is the same error upload into OSGrid FireStormOS-64.app

I don't know word below.
description
hints
Indication

Oh well let you go I believe they continue bug.
I don't know how to use code of .dae