PeterN
As for you, WTF would it matter if LR uses a different file than PS. PS for Apple machines is a different file than PS for Windows, although the function is the same. The only purpose for your question was to troll a fight.

nospam
photoshop for mac and windows use the exact same file format.

Eric Stevens
... for images.

nospam
the app itself may be different but that doesn't matter.

Eric Stevens
That the app for Apple machines is different to that for Windows is what PeterN has just written. You are both agreeing with him and confirming what he wrote.

PeterN
As for you, WTF would it matter if LR uses a different file than PS.