The look and feel of Mail is different with a more iPad look-and-feel.

This is turning into a very big issue, so hopefully Apple will get on top of it quickly.

This is an issue with Mac Mail and they are apparently aware of it (only receiving email is an issue, sending is fine). It prompted me for my password continuously but I keep getting an error message saying my password is invalid.

The first app I opened was Mail trying to connect to an IMAP account.

A plus sign appears and you can add desktops. I re-created them by opening Mission Control (three-finger swipe-up) and scrolling to the upper right corner.

I previously had 4 Spaces (individual desktops), which disappeared after the upgrade.

Below are some of the differences that I noticed having used OS X Lion for less than 2 hours now: The installation process itself took about 15 minutes and I had no immediate problems. I downloaded OS X Lion through the Mac App Store, which took 1.5 hours on a fast ethernet connection. We had a preview post earlier with some of our favorite features as well. There is a very thorough review over at Ars Technica, shorter summary at Engadget, and an installation guide at MacWorld. Also, I want to rapidly upgrade my workhorse desktops because Lion supports multi-user login with each user having separate graphical interfaces. I chose to upgrade immediately to OS X Lion because there are several features that I want, most particularly iCloud syncing of Calendar, Contacts, etc. I will periodically update the post and add comments over the next few weeks. Below, I will describe my installation experience and the software I have tested so far. I have chosen to upgrade my laptop immediately and test some of the software I use everyday before upgrading my workhorse desktop. and a Mac desktop which is my primary data reduction/analysis machine. I have a Mac laptop for communication, travel, etc.

Mac OS X Lion has been released and can be downloaded and installed on existing Snow Leopard machines.

Mac os x lion emulator online