Xcode freezes when importing 3d collada models

I am trying to import a 3d collada .dae model into Xcode from Sketchup to use in an ARKit app. Xcode runs very slowly and crashes when I do this.

Is there any advice on this subject, i.e. maximum model sizes? Would an external GPU (e.g. Apple's External Developer Kit GPU) help? BTW, I am using the latest version of Xcode and MacOS High Sierra on a late 2015 iMac 27", i5 with 24GB ram.

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There shouldn't be any maximum sizes and no, the GPU shouldn't have any effect. You might try manually running the model through scntool (/Applications/Xcode.app/Contents/Developer/usr/bin/scntool) to see if that's what's crashing -- or if it successfully runs then import that result into Xcode.

Meanwhile please file a bug with the model causing the crash.

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