My Photoshop documents sometimes look very odd when I use Quick Look in the Finder. Instead of displaying the file as it should, it shows a strangely cropped version on a white BG. Or it just shows one layer rather than the composite of the layers. Is there some glitch with Quick Look and Photoshop on the Mac or is there a fix for this?
When you're saving your PSD file, can you check if 'Maximize Compatibility' is turned on?
QuickLook renders layers with alpha channels as white. PSD doesn't have enough data for QuickLook engine to render the correct version.
When you check 'Maximize Compatibility' while saving a PSD, PS adds a flattened out image to the PSD file data - thereby ensuring QuickLook can render it just fine.
Did you have an alpha channel in the document that looks like that shape?
Apple still has several problems related to confusing alpha channels with transparency (apparently, nobody over there reads documentation).
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