FLAC On A Mac


I know this topic appears here often but it seems to change every time I try to do a download.
I have a 7 year old MacBook Pro that i recently changed to OS to El Capitan after endless badgering from Apple to do so.  I previously had both XLD and Decibel on my OS for converting FLAC to Mac Compatible formats for the few downloads that I had ordered from HD Tracks.  
  I hadn't listenedto these downloads since the afore mentioned conversion.  i just ordered a new download (24 bit) from Presto Clasical and now I am getting messages that both programs will not work because they are from unknown developers.  Why these developers have become strangers to Apple after happily coexisting with them is another story but can someone tell me what the current best program for playing these files is>  My Internet search is unhelpful as everything seems to be recommending these two programs
mahler123
mahler123, when you get the message "unk developer" press the CONTROL key and try again.

Ok we are going to the Mac store today as my wife is disgusted with the performance of her 8 year old MabBook Pro since loading El Capitan.  I will ask the people there, though the drop off in Quality of the in store help over the past several years has been painful

Ok, both changing the preferences and and pressing the control key worked.  The problem now is that neither program shows up in my application file.  I downloaded XLD again, since it's free, but it isn't as it formerly did.  Now when I drag a FLAC file to the XLD icon the file Boyce's back to it's own folder.   
  Decibel wants to charge me again, and I had bought a 'lifetime '
subscription for $50 before so I didn't to use it.
  I have an Oppo 105 in the system which I use for audio only.  I bought a monitor and now I'm using the Oppo USB input to play the files.

Drag that xld icon to your application folder.o install it as an application. Then it should appear as an icon you can run as an app.
If you drag the XLD icon to the bar at the bottom of your screen it will stay there all the time. Then whenever you open Finder and drag a file down to the icon at the bottom, XLD will open and start converting. Cheers,
Spencer