for MacbookPro Lightroom 6 is a noisy impertinence

I have 6 (fortunately) installed Lightroom only as a trial on a current i7 MacBook Pro 15 ". It runs (as the 5 Series Version) wonderfully smooth and very fast. The graphics card is integrated and so after a few seconds the fan to the maximum booted from 6,000 rotations Disabling the graphics card settings did not bring any improvement in Lightroom 5 fan Caution are actually audible only during import, but not the development or Library mode I have Lightroom 6 removed from the SSD....: Lightroom 6 overwrites the Catalog Previews (the preview images) irreversibly in the 6 format. Back in the 5 Series does not work anymore. Well, I have previously made a backup of the 2.79 GB file.