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Thanks. &nbsp;GraphicConverter opens them but the other 2 don't.
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Thanks.  GraphicConverter opens them but the other 2 don't.

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I have compressed TIFF colour scans which were compressed using 'old JPEG' (tag 6) and 'JPEG' (tag 7), however I cannot open these in my new iMac with Preview.
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I have compressed TIFF colour scans which were compressed using 'old JPEG' (tag 6) and 'JPEG' (tag 7), however I cannot open these in my new iMac with Preview.

Opening JPEG compressed files in Mac OS X

Photo and imaging software is used to edit and compose raster images; Adobe Photoshop, which dominates the market, has its own topic. Common actions include cropping, slicing, retouching, color replacement, masking and erasing. Other programs include Apple Photo, Corel PaintShop Pro, GIMP, Serif PhotoPlus, Pixlr, PhotoScape, Picasa and IrfanView.

Images and Photos

Mac OS X is the desktop operating system from Apple Inc., found on Macintosh computers. OS X consists of a Mach/BSD-based kernel, operating system interfaces primarily based on FreeBSD and additional frameworks (written in C, C++ and Objective-C providing user interface and application-level services.