After installing OS X Lion, I tried to run Windows Bootcamp through VMware (3.1.3) and got this error:

Cannot open the disk ‘…Library/Application Support/VMware Fusion/Virtual Machines/Boot Camp/Boot Camp.vmwarevm/Boot Camp.vmdk’ or one of the snapshot disks it depends on.
Reason: The partition table on the physical disk has changed since the disk was created. Remove the physical disk from the virtual machine, then add it again.

This can sound misleading. Delete Boot Camp from your Virtual Library, but Keep File.
Shift+Cmd+L

Select Boot Camp, hit Delete (or fn+Backspace or fn+Delete). Keep File.

Then, click on “Run Windows from your Boot Camp partition.”
VMware will then prepare your Boot Camp file again.

After this, you should be all set. Don’t disturb it while it’s doing this… it should go right into your VM.


:; gem update --system
Updating RubyGems
~/.rvm/rubies/ruby-1.8.7-head/lib/ruby/1.8/timeout.rb:60: [BUG] Segmentation fault ruby 1.8.7 (2011-06-30 patchlevel 352) [i686-darwin11.0.0]


The problem here is that ruby doesn’t like the new llvm-gcc-4.2 compiler.


:; ll /usr/bin/gcc*
lrwxr-xr-x 1 root wheel 12 Jul 25 12:14 /usr/bin/gcc -> llvm-gcc-4.2
-rwxr-xr-x 1 root wheel 113024 May 15 23:37 /usr/bin/gcc-4.2


So, uninstall this ruby and recompile using the old gcc-4.2 compiler.


rvm uninstall 1.8.7 && CC=/usr/bin/gcc-4.2 rvm install 1.8.7


Since llvm is the default compiler, you’re going to see some grumblings in the ruby community, and as someone told me, in installing Ruby Enterprise Edition.

Problem: It appeared to run correctly, but then nothing was available. If I tried to re-run it, it wouldn’t let me pick a drive because it said it was already installed. Looking at it from the app store, it would not recognize the install.

Solution: Go into your Applications folder and look for “Install Xcode.” Why in the world would it just install the installer and not tell you to go run it is beyond me. It hasn’t been done like this before… why assume people would know what to do next after the install would say it’s done.

If you don’t have a LAN cable to plug in (we didn’t), then you have to buy Samsung’s ~$80 wireless network adaptor. Reportedly, it was originally on sale for $35, and is the same hardware I believe, but, they probably discovered they could charge more. I understand their position on this. There are lots of network adaptors out there, they want one that already has the drivers on it because the player and TV don’t act like a computer and can download / install drivers. However, they could have allowed you to connect a computer to it to download the needed drivers, but whatever. Their product, their choice.

Anyway, we looked quite a bit for a USB adaptor and ways to resolve this without having to shell out $80 on top of the not-so-cheap player already. I even considered dropping a LAN cable in the wall.

Anyway, you want to hear about the solution. As it turns out we have AT&T Uverse and their Motorola digital “STB” (set top box). I was curious, if the LAN port on the back of the STB is not being used to feed it connection and using a coax cable instead, would the LAN port (RJ-45) share its connection?

I grabbed a short Cat 5 cable and tried it. I went to the Menu > Setup > Network screen on the player and changed it from “Wireless” to “Cable.” The next thing I saw was, “There’s a firmware update would you like to download it?” Heck yes I would. I tried it, and it started downloading! My wife and I high-fived and will soon be watching movies from Netflix streaming.

Cheers!

Let’s say you have a table to create, and start using it right away, in the same script. If you try to use it right away, it will error out as the table doesn’t exist yet.

class CreateJobLevels type)
end
end

def self.down
drop_table :job_levels
end
end


You need to use: reset_column_information

class CreateJobLevels < ActiveRecord::Migration
def self.up
create_table :job_levels do |t|
t.integer :id
t.string :name

def self.down
drop_table :job_levels
end
end


NoMethodError (undefined method `set_cookie’ for #):

It actually isn’t so much to do with Tamper-proof cookies, as it is that set_cookie has been deprecated in favor or http_only=.

So, if you’re having this issue, open lib/tamper_proof_cookie_jar.rb and search for “set_cookie” (should be line 38).

replace with this:

http_only=options


Or, anywhere you were using set_cookie, use http_only= instead.

Restart your app server (apache, mod_rails, mongrel…) and it should work for you now.

From a dev perspective, there are a number of things that changed with the update to Leopard.

On the Snow Leopard DVD, under “Optional Installs”, install “Xcode.mpkg”. Use all default options.

If you were using MacPorts,it will need to be updated.
Install the latest for SL (1.8.0): http://www.macports.org/install.php
Then, follow this guide to update MacPorts – I suggest doing the manual method to make sure you don’t install stuff you don’t really need. I installed coreutils, and it installed pretty much everything else I needed. If you’re running MySQL through MacPorts, don’t add it back. You’ll be guided by the Ruby on Rails guide to install the 64-bit version next.
The user will probably want wget… installing that gets you openssl, zlib.
http://trac.macports.org/wiki/Migration

Ruby on Rails__
This is an excellent guide, do follow this:
http://weblog.rubyonrails.org/2009/8/30/upgrading-to-snow-leopard Before you read this post and give up, look up your errors in the comments. I had 2 or 3 issues and what do you know? Others had the same issues, I followed a few of the comments where people address others’ issues and viola… working nicely now. Another tip for MySQL: When you install MySQL from mysql.org, be sure to pick the right one.. I kept getting the PowerPC one because it was at the end and had a “64″ on it… I realized I needed the other one.

This should get you through most of the changes for Ruby on Rails, and a good start on developer machines in general.

Post any questions you have.

Cheers,
Richard

How do you change this?
If you have a machine capable of 64-bit processing, and you’re bold enough to go 64 only, hold down 6 and 4 on boot up. It will make the machine boot up in 64-bit kernel mode – but be ready for 32-bit applications to break.

Here’s how you find out if you’re machine is capable of 64-bit processing:
http://support.apple.com/kb/HT3696

Mail and iCal work great. I had a little tweaking to do to make it check Exchange mail through our external URL (webmail). Just had to use the full UPN (UserPrincipalName) for the username, AD password, and the external URL for both internal and external servers.

The PlugSuit is incompatible (particularly with Quicktime I think). Here is how you disable it (you might have to enable and then disable it for the disabling to take).

When trying to start VPN, I got the horrible CiscoVPN Error 51 I complained and solved here.

But this time, I couldn’t fix it. It seems the CiscoVPN folder I referenced was removed. After some investigation, I found that Apple has included VPN capabilities into the OS. You just go to your System Preferences, Network, and hit the + to add a new network interface, select VPN. Then select whatever VPN parameters you need to – check with your pleasant and always helpful IT Admin for the params.

Cheers,
R

I’ll post my thoughts on the whole experience, but in this post, I want to highlight an issue I ran across.

I was previously running 32-bit MySQL 5.0 installed over Mac Ports. After I ran through this great post on upgrading to SL, I found I started getting this error in my RoR log:

Bad CPU type in executable…

As it turns out, I actually had installed “Mac OS X 10.5 (PowerPC, 64-bit)” from MySQL, instead of what I should have installed: Mac OS X 10.5 (x86_64).

The solution:
Just download the right one and install it. I have a 64-bit capable, Intel Core 2 Duo processor, so this was the right one for me. Here’s how you find out what you have.

Good luck!