cart before horse
Adobe would have been thrilled to have Flash running on iOS.
Adobe would have been thrilled to have Flash running at optimal speed on OS X.
But Apple won't sanction Flash on iOS. and it won't share the APIs with Adobe to allow Flash to run quickly on OS X - the Flash player is forced to do more system-level operations that make the whole thing run slower than it does under Windows or Linux.
Steve Jobs claimed he was keeping Flash out of iOS because Adobe had too much power in a particular aspect of web content (interactive animation and video), and their software was proprietary. Yes, Apple was shouting about how proprietary software was "bad." Apparently the public didn't think so, because 90+% of desktop PCs had Flash installed.
Then, from his niche market (17% of mobile devices, 7-10% of desktop and laptop PCs), Steve stuck his gift for hype and salesmanship into Adobe's side and got enough people to believe that Flash was an evil cancer on the web and a glaring barrier to "Open Web Standards."
Ask Apple how committed to "Open Web Standards" they are when their own browser won't support Webm video (the open standard), but DOES support H.264, which Apple owns a piece of...