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Oh my god. Everything is white and buttons are without borders.
I can't even see where windows overlap. And the animations are sooo slooow.
How can I get the Start Menu back?

I was thinking of going to mavericks beta, but thanks to your post I think not. lol hope you get it figured out.
 
For you guys (and gals) running Mavericks on a daily basis, have they implemented basic features like spinning down hard disks when putting the computer to sleep? I would just imagine small features like that would wait until the final release and I wouldn't be able to live with the fan noise when my computer is not in use!

Those features have never left. They're in System Preferences > Energy Saver.
 
In my opinion, Mavericks has been stable enough to run since the first beta was released. Of course, there have been some bumps in the road, but as of now, DP8 is definitely stable enough to be using. In fact, I have been using versions of Mavericks since July. :)
 
Been running Mavericks on a 1.7Ghz i5 mid 2012 MBAir for about two months now with very few hiccups. Have yet to find a drastic problem.

Mostly use MS Office, Safari, Citrix Receiver, Apple Remote Desktop (beta build obviously), Messages, Outlook, Shoretel Communicator and some Xcode apps. No games (work Mac), very rarely watch videos outside of Plex web access, no heavy duty photo work, etc.
 
The first update didnt help much

10.9.1 still hosts problems such as core apps dont open.
any solutions?
 
Upgraded from Mountain Lion. It looked good firstly. But later when I tried to make some space for my 2011 Air to have Windows 7 installed, the disk space can never be reclaimed. It always occupies 100GB disk space no matter what has been deleted.

So I deleted all the applications and documents and whatever files I can, it still firmly holds the 100GB disk space and only allows a 20GB partition for Windows 7, which is far from enough as Windows 7 itself after updates will occupy up to 17GB. I have to do a scratch re-installation to get it back to Mountain Lion.
 
I believe it is. And it has to be! Although we didn't pay for the OS, we paid (some says a lot) for the computer. I believe Apple should be making enough revenue to hire a QA team!
 
I have been using Mavericks since the first beta, and it is running pretty stable. I have no issues with it at all. Overall I am happy with the new OS, but the difference to Mountain Lion isn't that big, unless you have a Retina Mac.
Safari 7 is the biggest, greatest feature of Mavericks. It runs amazing well and it has made me forget about Chrome. iCloud Keychain is also great and I love it, even if it didn't replace 1Password for storing my credit card and other information. (it did replace it for web logins though).
 
10.9 has been rock solid for me on both my 2009 Mac Pro and 2013 Mini 2.6GHz i7. Not a single app has been unstable, even older apps like Quicken 2007, Office 2008, Bias Peak Pro and Premiere Elements 11 and Creative Suite 5.5 run like clockwork. The only gotcha has been my external Firewire drives: no sleep via Energy Saver or manually. My old MOTU Ultralite audio interface works fine via FW. Only FW drives are sleepless but otherwise work fine. I eventually switched them to USB and they sleep fine but are much slower to access.

I updated to 10.91 and what a friggen mess: startup slowed to a crawl and the finder was all but useless: click on a menu and it opens several seconds later. Restored back to 10.9 via Time Machine and all was well.
 
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