[Performance] Fresco on iPad - files not syncing onto my iMac

Hi there, My Fresco work on my iPad is not syncing to my files on my iMac. File synching is said to be up to date but when I check the files on my iMac they are not appearing. The only way I can get the files onto my iMac is by exporting them as a jpg. I'm unable to export them as a psd file. Does anyone know what I can do to fix this? Thank you in advance. 

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