@zalex108 - success! I decided to try deleting the UNDATED folder in application supprt, relaunched Opera, and now at least two of the previously blank pages work perfectly.

So now I have dated folder in application support and undated in Cache (the "date cache" suggestion was unnecessary).

It might have been helpful if you had mentioned that one should delete the undated folder in application support, but we got there in the end. I still am bookmarkless, but I will add them as I go along.

Thank you for your help!

@xgipper, same problem for me, and I used the gotoes option you've suggested.

@zalex108, I now have both a dated and an undated version of com.operasoftware.Opera - would it be safe to delete the dated copy to see if that restores what I've lost? (See my last reply.)

Thank you, @zalex108 - I have now been able to rename com.operasoftware.Opera using Gotoes (Funter was not supported on my OS).

However, this has not sorted out the problem, and means I have now lost all my bookmarks and cannot login to my email in Opera, since the login page is one that loads blank.

@zalex108, I've just seen your private window suggestion, and I'm afraid that doesn't work, either without or with cleaning.

@zalex108, the path goes either: Users/(myname)/Applications (and then nothing)

or (disc name)/Library/Application support/ (and then no entry for com.operasoftware.Opera)

although "About Opera" says that the profile path should be:

/Users/(myname)/Library/Application Support/com.operasoftware.Opera

Any suggestions as to how I can get round this anomaly? (And thank you for your efforts so far. The problem seems to be affecting a number of users.)

Hi @zalex108 - your Clean Profile link goes to the Opera for Windows FAQs.

I have disabled all Opera extensions, which has restored some web pages, but some still load blank. Ironically, I cannot access Opera's pages, and have had to make these posts on Firefox.

Sorry, I was very tired when I posted - I should have said: I'm using Opera 37.0.2178.54 on MacOS 10.7.5

When I open a new tab, many sites begin to display their content, then the page goes blank - either white, black or grey. Facebook still works, as does Yahoo. Annoyingly some of Opera's own pages load blank. I found a discussion covering this, but the advice given, although it was posted under Opera for Mac, referred to Windows.