Since Mac OS X 10.9 Mavericks, Apple has introduced "app nap" feature to dynamically pause or slow down the app when it sees proper. The apps, that mostly likely to enjoy such "nap", would be some kind of app with long running back end process, minimum or no user interaction and not in the foreground. Obviously JoyBidder eBay Auction Sniper application falls into this category of apps that Apple has determined to make it an example to make the earth a little greener.
This is disastrous to eBay sniper program users, for obvious reason, even off by several seconds, you will miss the snipe. That was why in my previous post I have warned Mac user about this and provided a workable solution.
Here is the screen shot to show how to disable "app nap" for JoyBidder eBay Auction Sniper Pro edition. This also applies to JoyBidder eBay Auction Sniper Free edition as well.
Also, the latest version of JoyBidder Pro and JoyBidder Free for Mac OS X, have an experiment implementation to automatically disable the "app nap". This is experimental, meaning, it might work for some, not working for others. Please test it out before you bet your lift on it. You best and safest bet is still to disable the "app nap" through Finder as shown in the above screen capture.