Sorry realised that was vague but unable to edit. Deleted this: Profile: /Users/my user name/Library/Application Support/com.operasoftware.Opera

but browser isn't really working again sufficiently: the few sites I use Opera for are either not rendering correctly, or reverting to a white screen as previously reported (same in private window), so stopped using this browser for now and reverting to an old Safari.

Ridiculously, can't update Safari due to running Mac OS 10.8.5, so I have to put up with the mobile verion of Twitter among othr things. But that's another story. Will invest more time into researching any other possible browsers sometime, or may just have to have a windows PC running at the same time to view some sites.

I have mine sort of working again after deleting the opera folder in prefs and restarting it, although Facebook is missing the icons along the blue bar at the top. I didn't have time to try to understand the stuff about the cache, but I did spend a bit of time researching alternative browsers. If this really a widespread issue perhaps some kind of fix can be offered via an update, rather than people having to scrabble around hiding and unhiding system files and so on (and risk losing bookmarks gathered over perhaps years) when in a lot of cases users are perhaps not confident to get involved. Just my 2pth.

PS Interestingly I have also had some issues with 'malwertising' which took over one of the sites I run, from pretty much the same time Opera went wrong, although I don't usually use Opera to view or administer that site, and I suspect the issue is something to do with Adsense code.

@peciacake I don't think I have an Opera account, other than on this forum. What is it for?

Yes Google search and analytics work for me using Opera, but nothing else I usually use it for (only a few sites, which as described appear to load, and then promptly disappear, although some partially load). Also with the new preferences file, perhaps obviously, it no longer remembers my passwords or bookmarks, which is an additional annoyance, so as this change hasn't made any difference I may revert to the former one when I have time - unless another solution rears its head.

Thanks.

Thanks for the support. I did this inc displaying the hidden files:

"Go there and rename com.operasoftware.Opera ==> Eg: "Date".com.operasoftware.Opera - 03.09.2017.com.operasoftware.Opera"

but, although the first time Opera opened it seemed to think it was a new installation and it then did display Facebook, one of the ones I was previously having trouble with, now it is all white again, as are other sites I commonly use. (BBC.co.uk displays a portion of the content!; Google works; life's too short to test every website ).

Guess I'll try it once more when I have some time, cos it's a bit of a faff!, and then possibly have to see if I can find another browser that will work on my system, alongside Firefox which I also use (but need two!).

BTW there's an app that makes it simpler to view hidden files on a mac if it helps anyone (I believe free or donate) - http://gotoes.org/sales/ShowHiddenFilesMacOSX/How_To_Show_Hidden_Files.php

Hi. Opera on my Mac has just exhibited a perhaps similar pattern after successful use for some time (not aware of any upgrade having taken place): I go to a web page, eg facebook, the page flashes up for a second,it appears to reload, and then it reverts to all white. So this seems to be happeining certainly at facebook.com and theguardian.com. However I've found a couple of sites render OK - google analytics and google search for example. Not experiemented further as had to switch to alternative browers.

Could you clarify how to try with a clean profile please? What does "just use Apple paths and Finder" mean? Currently under Paths I have:
Paths

Install: /Applications/Opera
Profile: /Users/my user name/Library/Application Support/com.operasoftware.Opera
Cache: /Users/my user name/Library/Caches/com.operasoftware.Opera

What specifically do I need to change with this please?

I have also tried clearing cache and cookies.
I am using Opera Version: 37.0.2178.54 - Opera is up to date
System: Mac OS X 10.8.5 64-bit
Thanks for any assistance.