• 53.0.2893.0 (macOS), the Code Signing has been changed to A2P9LX4JPN.
• 1Password Extension don't work, which is related to the new signing (the usual troubleshoting has been done, either on their side or Opera. Reference: https://support.1password.com/extension-troubleshooting/)
• Getting frequent crashes when opening a new tab for ”Manage Extensions”. Crashlog: https://gist.github.com/christopheranderton/6487066001ba719495fa4bab6970fdc4

@backside9 Seen this too, and was at first confused what this was. Mine looks the same, with the exception that on Opera Developer; ”The sidebar” and the Extension Bar have switched places comparing to your screenshot.

@bobamamda-0 It's hard to say why it crashes.
Question: What Extensions/Add-ons is installed?

Have you tried disabling all extensions and restart Opera to see if there is any difference (see note below)?

Note: Download from: https://ftp.opera.com/pub/opera/desktop/49.0.2725.64/mac/ (choose Opera_49.0.2725.64_Setup.dmg)

Install Opera 49, disable all extensions, and while we are at it, go to opera://flags/ and press the ”Reset all to default” (for good measure) and then go to opera://about/ and let Opera autoupdate.

When done, restart Opera, and it will maybe autoupdate again (let Opera do this, and restart the browser again when it's done).

If the browser don't crash, try to enable your installed extensions one at the time and see if you experience any issues.

If even this will fail, and Opera keeps on crashing, we need to know what's going on. Before you take any further action, it's a good idea to backup your settings which is located at: ~/Library/Application Support/com.operasoftware.Opera/ (use Finder, and the menu ”Go -> Go to folder…” and copy/paste the line above. Hold the alt key on your keyboard and drag the folder at the left of the window title which says ”com.operasoftware.Opera” and drag to your Desktop or any other location)

1. Uninstall completely. The easiest way to do this is to use a freeware third-party application named AppCleaner, don't be fooled by similar named applications if you search on Google, most of them are adware or worse, you need to do some research first. Always download directly from the developer (not from Softtronic, MacUpdate or others), in this case: https://freemacsoft.net/appcleaner/ (i have no association with the developer)

2. When AppCleaner.app is installed in the Applications folder, launch AppCleaner. Drag the Opera.app icon to the AppCleaner window and wait a couple of seconds.

3. Press the button ”Remove”, and for good measure restart or logout. When logged in again, empty the Trash.

4. Download Opera from https://www.opera.com/computer/mac and see if it works again.

5. If Opera still crashing, a crash dialog will display asking you to send a report. Go to https://pastebin.com/ (no need to register) and copy/paste the log data (or take a screenshot like: https://i.stack.imgur.com/XVMYV.png) and post the pastebin link/or screenshot here.

You can also try Opera Beta or Opera Developer.

One general advice is to see if you have any malware which mostly comes from shady browser extensions, ”video downloaders”, ”Facebook Themes” ,”system cleaners” and so on. One of the most well known free anti malware scanners is: https://www.malwarebytes.com/mac/ and i recommend to do a scan.

What version are you using? (In the left top corner menu ”About Opera”)
Could be realted to: https://forums.opera.com/topic/24826/2850-os-x-display-corruption-52-0-2850-0-does-not-work-on-10-12-6-revert-to-52-0-2845-0-and-issue-goes-away

@mickrussom Yes, have the same issue. Posted this in the comments section on the blog for the release:

”Having serious issues with the UI and UI painting i never seen before. Pixel edges (until you resize the window), new windows display parts of the underlying window content and more. This build is unusable, atleast on this system. Tried the standard things. Starting fresh (deleting profiles, uninstalling completely using AppDelete and a custom shell script, disabling the few extensions installed etc…

I know there was a related issue in Chromium: https://bugs.chromium.org/p/chromium/issues/detail?id=794819 (while this don't look like this).

• 1). Photos of the issues (screenshots don't display any issues): https://imgur.com/a/DyciS
• 2). opera gpu output: https://gist.github.com/christopheranderton/4b8c39d2df78e6a36d155548811ce190
  *Note: It says Canvas: Software only, hardware acceleration unavailable, while other Chromium based apps says (including Opera Stable and Opera Beta): Canvas: Hardware accelerated. Enabling: Override software rendering list does show Canvas: Hardware accelerated, but don't fix the issues.

EDIT: Chrome Canary 66.0.3334.0 (Official Build) canary (64-bit) has now also: Disabled Features: accelerated_2d_canvas, gpu_rasterization pointing to Issue 794819 (Chromium Bug Tracker).

Developer Build 52.0.2850.0. Mac OS X 10.11.6 64-bit, iMac Retina 5K, 27-inch, Late 2014, 32 GB Ram, AMD Radeon R9 M290X 2048 MB ”

Confirmed that reverting to 2845 will ”solve” the issues.
Here is the Opera GPU report for this build (all flags set to default): https://gist.github.com/christopheranderton/a4caa741ef5a06155e895f71ff1bed62

@awfki Cheers! You can disable some of the functionality by disable some flags (internal settings/experiments) in Opera. Flags relating to Share (i have this disabled as well) is at (click, or copy & paste the links in the location field of the browser):
opera://flags/#mac-system-share-menu (Set to: Disable)
opera://flags/#more-share-menu-access-points (Set to: Disable)

After changing the flags, be sure to restart Opera.

@ron45 Please post:

• A link to a video that casues issues
• You operating system (Ex: macOS 10.12)
• Your Hardware info (under the Apple menu icon -> About this Mac) except your serial number

@jaraux You use a Hackintosh, and most likely there is issues with the Graphic Card drivers. I guess you use a GPU from NVIDIA. Check if there is any updates to the NVIDIA for Mac Webdrivers. But, it could be a issue with Chromium.

Try this: Go to opera://flags and enable Override software rendering list and restart and see if the tearing is still there. Also, check opera://gpu/ and post the results for Graphics Feature Status

@kyu3 It's a sanboxed and ”built-in” audio and video API in macOS/OS X. It will run when applications using this API needs to parse for example; video or audio (specially when no hardware acceleration is available for the media) The SpeedDial will is capable of showing animated wallpapers, so it may be that (even if you don't have animated wallpapers set).

However, can you check: opera://gpu/ and post the results you get for Graphics Feature Status.

After further research, i noticed that the issue most likely was because of some enabled flags (opera://flags/).
I reverted some of the flags i changed in earlier builds, and restarted Opera. Now everything, including history, works again.
So, check if you have enabled any flags, and either revert all of them back to default, or do it by trial and error.