MacBook M3 pro build failing

[Caroljpeg]

Hello, I'm trying to run OpenSplat on a MacBook pro M3 pro (Sequoia 15.1.1). The building process was pretty straightforward and completed without showing any error, but when trying to run ./opensplat --help I get this error Bus error: 10

[pierotofy]

Mm, strange; I just recompiled it on my MacBook Air M1 (Sonoma 14.6.1) and it seemed to work.

[AsherJingkongChen]

There are other 3DGS implementations work fine on Apple GPUs, you can look for them, too.

[kaicherry]

Hi...
I use opensplat on  silicon..daily now; it's actually quite nice and I wish @pierotofy didn't think it can't "compete against VC stuff" - I am using it because the "VC Stuff" is going to become "prohibitive" (it's part of the model, I am "around Silicon Valley"...)

Anyway, @pierotofy, this error does 'pop up' when I re-compile, from time to time, and I believe it is due to conflicts/libs being picked up from conda libs and not the brew ones, if this in any way helps.

Also..OpenSplat is great :D
I don't what "other 3DGS implementations work fine on Apple GPUs"...if at all :)
-K

[jared-krauss]

@kaicherry would you mind having a look at this and telling me where I'm going wrong? haha struggling to get the banana .ply made on my M1 Pro.

https://docs.google.com/document/d/1Qfyar0fL89X2R9JqByIpli1LtgETBIXKnbNzIyfjHx4/edit?usp=sharing

[LordLKY]

hi, i confront the same “bus error” problem on Mac mini M2 (Sequoia 15.1.1). has anyone figured out the reason?

[kaicherry]

Yes. When you update macOS, the .dylibs change and you need to build opensplat again. :/
NB: You should follow the BUILD.md -however- download and unzip libpytorch-2.5.1 from https://download.pytorch.org/libtorch/cpu/ (build errors on 2.6.0)

@jared-krauss WOW! You have added a TON of complexity; all you need to do is brew install colmap. That's 'stage one' and is all that is needed/'the minimum' to generate sparse point clouds that work with opensplat on our Macs.

OpenMVS I was able to compile following the build directions.

The lack of "density" from the Densify stuff was a fundamental lack of understanding on my part, and apparently others, too, on how to get the dense point cloud "back into" the 'sparse' point cloud that opensplat reads.

[jared-krauss]

@kaicherry i was following you until the lack of density part. referring to needs OpenMVS to get the dense point cloud?

Is this necessar for GS, or just for using it in other 3d programs so one has volumetric data as well?

Sorry if this is basic question. Lol. I studied history in university haha, not this stuff.

[jared-krauss]

I finally got my first one to work! Thanks for the advice on the redownload. Also, who knew, but I wasn't putting my images in an "images" folder alongside colmap builds, so the opensplat couldn't read it