There is a free program called Kill Disk I use. It's free and writes zeros to 
the hard drive. You can burn the program to a CD or use the USB option. It 
works for Mac and PC and it's a pretty great program.

Sent from my iPhone

> On Aug 7, 2016, at 3:55 PM, Jonathan Fletcher <[email protected]> wrote:
> 
> It depends on what kind of “cleaning” you want to do, John.
> 
> I have great luck with a bottle of Windex and a few paper towels now and then.
> 
> ::-)
> 
> I am not familiar with “Disk Cleaner” (as I don’t use any tool like that), 
> but you might want to try with some more, um, “open source” advice on what to 
> do. Educate yourself on the possibilities and see if this article alone gets 
> you where you want to be.
> 
> http://macpaw.com/how-to/startup-disk-full-on-mac-os-x
> 
> It looks to cover a lot of the bases.
> 
> Jonathan
> 
> 
> 
>> On Aug 7, 2016, at 12:00 PM, John Humphries <[email protected]> wrote:
>> 
>> Is "Disk Cleaner" from the Apple store a good cleaner for the Mac?
>> John H.
> 
> --
> Jonathan Fletcher
> [email protected]
> 
> Kentuckiana FileMaker Developers Group
> Next Meeting: 8/23/16
> 
> 
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