Open Disk Utility (Applications / Utilities) on your Mac. 
Select your disk from the left menu and then click First Aid and then click 
Run. 
This will fix volume errors.

Kind Regards,
Ronni

 Ronni Brown’s iPad Pro 12.9-inch 256GB 


> On 1 May 2020, at 11:56 am, Rosemary Spark <[email protected]> wrote:
> 
> 
> My husband is still running Mojave 10.4.6 on his Macbook 13inn Early 2013 
> model.
> A really weird problem has arisen. He can't open any file or folder in any 
> programme (Mac or otherwise) with his mouse or trackpad without going to 
> File>>Open or in Calendar>> Edit Event).
> He's re-started his machine; installed a new mouse,  but he (and I ) are out 
> of ideas at this point because it's such a strange problem.
> 
> Rosemary Spark
> PO Box 781
> South Fremantle WA 6162 Australia
> Phone: + 61 ‭8 6397 6822‬
> Mobile: 0414268043
> 
> 
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