Photos appearing as blank rectangles
Since I goto Photos, the migrated photos from Aperture are appearing correctly (although all projects have disappeared) however new photos from My Photo Stream do not appear : Photos just displays blank rectangles. By right-clicking on the rectangle, it is possible to get info on the photo, which sort of confirms that the photo is there. However it is not possible to view the photo. Has someone faced the same issue ?
OS X Yosemite (10.10.3), new Photos App