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Why, when I dou­ble-click a Pho­to­shop doc­u­ment on my Mac, does the CC 2017 ver­sion of Pho­to­shop al­ways open, and not the more re­cent CC 2018?

Mac|Life - - CONTENTS -

Our ex­perts solve your Mac and iOS prob­lems.

This ap­pears to be a gen­eral prob­lem if you have both of these apps in­stalled, re­gard­less of the ver­sion of macOS that is run­ning.

In macOS, it’s the Launch Ser­vices in­ter­face that is re­spon­si­ble for de­ter­min­ing which app kicks in when you open any file from Fin­der. If you don’t like the de­fault as you sug­gest, you could se­lect a file in Fin­der, choose File > Get Info, ex­pand the “Open with” sec­tion of the win­dow that ap­pears, choose your pre­ferred app from the pop-up menu, then click Change All to apply your choice to all files of the same type.

In this case, though, that method doesn’t work. In­stead, the only way that you can get a Pho­to­shop file to open in Pho­to­shop CC 2018 is to keep that ver­sion of the app open, and keep CC 2017 closed.

Launch Ser­vices works us­ing app sig­na­tures and doc­u­ment types. Here, Adobe ap­pears to have a bug in its use of app sig­na­tures, which pre­vents Launch Ser­vices from as­so­ci­at­ing Pho­to­shop’s doc­u­ment type with CC 2018. As sig­na­tures and types are set in prop­erty lists in the apps them­selves, you can’t change them with­out break­ing the app’s code sig­na­ture, which is re­quired by macOS’ Gate­keeper fea­ture to pro­tect your com­puter from mal­ware. Only Adobe as the de­vel­oper can fix this is­sue.

En­sur­ing Pho­to­shop docs al­ways open in Pho­to­shop CC 2018 re­quires that you quit any older ver­sion you might also have on your Mac.

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