OS X Mountain Lion has been available since last Wednesday. It's already been downloaded more than 3 million times. It has also moved beyond 3 percent of all Mac web traffic, based on analytics supplied by Chitika.
All in all, it appears that a large number of people are installing Mountain Lion, which brings us to today's poll.

Tom,
Referring to “3% of all mac web traffic” is somewhat misleading since it’s only a rather small part of currently installed OS X machines that can actually run Mountain Lion.
JMP
Install took longer than expected and I got the negative “minutes remaining” message. Probably took 1.5 hours to fully complete.
First issue was the notifications, which kept poping up in the upper-right corner. I turned off a few email subscriptions before realizing it was a new OS X feature. Then I spent the time to find the controls and shut it off completely.
And the restore of the “save” function is half-hearted. I can’t believe the web comments that DUPLICATE and SAVE are the same thing. With SAVE, as it originally worked, one key stroke did the duplicate AND gave me a directory pointing to the original document, at which point I could rename and save it there or, as I usually did, put it into a directory of my choosing. Often I did this with downloaded files from emails; I don’t know or care where email keeps them, I want them in a directory related to the document or file.
A minor twit: the email no longer shows an activity indicator when I hit GET MAIL so there’s no confirmation that the network is working and that each email server is working.
Ray
I installed it a few days later. No problems with the install on a 2010 MBP. However, my ZFS stopped working. a quick email to 10′s Compliment confirmed that I was 2 upgrades behind, and the latest version worked with Mtn. Lion. Why Apple refuses to use ZFS over the crappy HFS+ is beyond me. A few other small helper programs stopped working until an upgrade, but other than that it was painless. I haven’t found anything I don’t like about this upgrade.
VMware fusion did not work. Am awaiting news from VMware. What about Parallels???
According to Apple’s App Store today, 8-1-2012 @ 2:15pm PST:
Apple’s Newest OS called, “Mountain Lion” has achieved the following Customer rating:
From a 5 star rating system they have, 38.5% of the *commenting* customers rating this new release are less than 100% satisfied. Pretty sad indeed. Glad I did not pay for or download this release that Apple headlines as, “World’s most advanced desktop operating system”
Have been running Mountain Lion for nearly a week. Very few problems:
Needed to reinstalled Parallels and upgrade Little Snitch
Messages would not allow me to register my iCloud/MobileMe ID – turns out I have an unwanted .mac ID that confused it. Getting Apple to delete that ID is a major hassle
The Show-stopper – Many people have found that Mail will not work with MS Exchange. See this Discussion Thread
https://discussions.apple.com/message/19033491#19033491
Anyone who relies on Excghange for business should NOT install Mountain Lion until Apple fixes the problem.
Big problem with Mail not working with MS Exchange:
https://discussions.apple.com/message/19033491#19033491
Parallels needed to be reinstalled
Little Snitch needed to be updated
I miss being able to zoom my screen by holding down on control and
scrolling. Tapping my mouse only works occasionally.Otherwise, no problems.
There are still too many apps I use that are not yet working with Mountain Lion like Toast.
“(8) John R says:
I miss being able to zoom my screen by holding down on control and
scrolling. Tapping my mouse only works occasionally.Otherwise, no problems.”
To zoom you need to go in accessibility in sys. prefs and enable the zoom function. It is still there.
Thank you for the tip T. I have the zoom back now!
I’m not sure what caused my problem, I think it started about 4 months ago. I changed my HDD to an SSD. I used Carbon Copy to make a clone. So, I got a case and put my SSD in the case, booted from USB Flash drive, cloned my HDD into my SSD. That step was fine, so I swapped the SSD and HDD around. Everything was fine. Until the Mountain Lion upgrade. The installer stopped at a failure to create the recovery partition. It might because the clone did not copy the Lion recovery partition correctly as far as permissions. I could still boot from the Lion recovery partition on my SSD.
Nothing could be done, the installer kept failing at the same point. It was trying to upgrade/create the recovery partition. I had to reformat my SSD, reinstalled Lion, then ran the upgrade to Mountain Lion. I think that Apple should let you upgrade without the recovery partition. I would never use it. I have already created everything I need on a new USB Flash drive (I tested it, it works). Used TimeMachine (I have two, one at work and one at home) restore to put everything back. So this turned what I was expecting to be a 3-4 hour upgrade (including download) into nearly a two day upgrade. I can’t for the life of me figure why Apple requires a recovery partition creation before allowing the upgrade. Sure it can warn you multiple times, but should allow the install/upgrade to continue, asking permission to not have the on-disk recovery. After all if your disk dies, that partition won’t be worth anything and will be equally inaccessible. If anything, it should ask for a USB Flash drive to put that recovery there, but if you chose not to, that it should be good as well to run with the risk.
Since installing Mountain Lion, I am unable to sync Calendar on my iPhone. Very frustrating!
I cant get Mountain Lion to install on my 4,1 MacPro. I have tried downloading it again in case the installer was corrupt but it wasn’t that. I have created a USB thumb drive to install it but when I try to run it it says there was a problem, try reinstalling. When I go into Disk Utility via the USB drive no hard drives are appearing despite there being no problems with them otherwise.
Mail refuses to send emails. Says server unavailable but all other mail to from other accounts unaffected. @me.com emails work fine of other computer and iPhone. Web mail seems to work ok though.
Also having issues with some web pages failing to display, including Apples own help web page regarding Mail amongst others.
Very frustrating!!
Installed without a hitch until restart – lost all red color -cannot recalibrate
but if I change user to guest instead of Admin, colors come back!
weird
The worlds most advanced OS? Outrageous – constant lockups. Finder is hopeless. It cannot show the files on my attached NAS – let alone search them.
Apple is grossly overrated and is, in my opinion, no better than windows – often worse, in fact.
2 years of continued problems with no end in sight – this will be my first and last foray into the world of Apple.
Any OS that has such an appalling file management system should be avoided – network attached devices – surely the average punter wouln not use them. According to Apple – no need to search such a device – really.
Each update seems to make my late 2010 iMac worse – absolute disgrace.