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helpfully in its 2FA web support shows the last time each was used. Much more useful, and we wish Apple would move to that approach.

Merge iPhoto and Photo libraries on a Mac Q: How can I know whether the pictures in the iPhoto library are also in the Photos library? How can I move a portion of the older images away while keeping the last few years on the laptop? Christoph Stork A: Christoph Stork’s photo libraries are overflowing. He owns a MacBook Pro with a 750GB drive, but has an iPhoto library that weighs in at 190GB and a Photos library that takes up 250GB. His drive is almost full and he’s not sure how to proceed. If you followed the steps to import your iPhoto library into Photos whenever you started using Photos, all of the library’s full-resolution images weren’t duplicated. Instead, Apple chose to use ‘hard linking’, which Jason Snell explained back in April 2015 (see Instead of creating a copy of the iPhoto media, hard links just allow the same file to be linked in two or more places. Unlike an alias, which has a special icon and just points to another file, the hard link reference looks and acts exactly like it is a file. This means that, in this case, the 190GB and 250GB iPhoto and Photos library likely contain a whole lot of overlap. Thumbnails, modified images, and other internal data structures aren’t duplicated from iPhoto, and take up separate space in each library. New images imported into Photos would explain its larger size. JANUARY 2017 • MACWORLD 87 MWJAN17.indd 87

08/12/2016 13:52