How can I do a clean install of Opera on a Mac?

For painful and irrelevant reasons, a number of Opera-related files and folders have been corrupted or deleted from my iMac for one particular account, thus rendering Opera inoperable for that user.

To get Opera working again, I've tried to find and delete everything in that account that is Opera-related, but I must have missed some crucial ones, because even after deleting and re-downloading Opera from Applications, it will not run for that user. (I do get the message that this "is an application downloaded from the internet, and am I sure I want to open it?" So it's correctly looking like a first-time run...but all I get is a blink of the Opera icon in its Finder directory. No bouncing in the Dock, even.) Opera runs fine for me in my Admin account, just not for this one unfortunate user...who is also unfortunate in having been excluded from Time Machine backups (but that's another story).

This user gave up and used Firefox, Safari, Chrome, Camino, and OmniWeb for a while, but is unhappy with them and wants Opera back!

Can anyone list the key files/folders that must be deleted so that a fresh download will run?

Thanks!

Success!

I had been trying to determine what specific files to delete. Now, taking a more severe approach (which I should have tried sooner), I trashed

[user]/Library/Opera
and
[user]/Library/Application Support/Opera

(It's possible that other Opera-related things had already been removed.)

That solved the problem. The browser now works fine.

I use Cleanapp. Turn on the CleanApp service, start up Opera. Shut down Opera. Then have CleanApp uninstall it.

Hi there,
There are the folders/files that Opera / Opera Next use on Mac:

Opera (stable branch)
~/Library/Opera
~/Library/Application Support/Opera
~/Library/Caches/Opera
~/Library/Preferences/com.operasoftware.Opera.plist

Opera Next (alpha and beta snapshots)
~/Library/Opera Next
~/Library/Application Support/Opera Next
~/Library/Caches/Opera Next
~/Library/Preferences/com.operasoftware.OperaNext.plist

Files used by all Opera installations
~/Library/Preferences/com.operasoftware.OperaWidgetInstaller.plist
~/Library/Preferences/com.operasoftware.OperaWidgets.plist

There is also some folders/files that can be add by specific labs builds with a pattern like this one: Opera <name of the lab build> on the same locations.

The "Opera/Opera Next" folder in ~/Application Support contain your emails/newsgroup/RSS feed, etc. data in "mail" folder and your extensions, unite and widgets data in "widgets". Be sure to backup them before deleting the folder if you want to restore them after the clean install.

The "Opera/Opera Next" folder in ~/Library contain your preferences and profile data. We sure to backup important files/folders according to your needs such as: wand.dat, bookmarks.adr, notes.adr, unite.adr, /sessions/, /dictionaries/, opssl6.dat, opcert6.dat. You can read Tamil's post about this http://my.opera.com/Tamil/blog/.

You can also have a look to opera:about page.