Wenn can we expect the right RAW-converter for the new Fuji X-T1 for Aperture?
sorry, no. Fujifilm X-T1 is not yet on the list of supported cameras, see:
Apple - Aperture - Technical Specifications - RAW Support
Only Apple could tell you, if or when raw support for the camera will be released, and they do not announce this information in advance. We are are only users here like yourself, so we cannot tell you.
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