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Help! Every time I try to download the newest update I get a dialogue box that states " Only a single instance of this application can run at a time".
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Use the offline installer(s)
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I got that msg once. I subsequently realized there was another flash player icon window open, behind the screen I was working on. When I closed it, I didn’t get that msg again.
But, I STILL have been unable to install flash player on my OS X 10.9.3, after DAYS of trying to figure out what is preventing it.
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Hello,
What error, if any, is being displayed when you attempt to install Flash Player?
Please post the contents of the /Users/<YourUserID>/Library/Logs/FlashPlayerInstallManager.log for the install attempts that are failing. These will be listed at the end of the file. Each attempt begins and ends with --- log start --- and --- log end ---.
Thank you in advance.
--
Maria
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Did you try to download the offline installer for Flash Player for MAC , as mentioned by Pat .
Did you get any error message.
You can also try to download Google Chrome, It has inbuilt flash player.