Apple Time Machine & Time Capsule prove to be a boon for backup-dorks. And I think most of us belong to that species ;-)

Most of the time TimeMachine works well in the background. The only point you may recognize it is the temporary performance loss if the backup is running.
But yesterday, nothing worked any more: Time Capsule reported an error:

“Time Machine Error – The Backup disk image „/***/***/***.sparsebundle“ is already in use.”

Problem: Time Machine and the connected Time Capsule assume, that there is a backup process still running. In my case, a cold (but necessary) restart of my Mac was the reason for the confusion.

Solution: Unfortunately a restart of my Mac did not help. The problem is the Time Capsule itself, which has to release the established connection. You can fix that problem with the AirPort Utility under Programs/Utilities. The brand new AirPort Utility Version 6.1 has only one function you can use: The restart of the Time Capsule. But that did not help in my case. Weird but true: the old AirPort Utility Version 5.6.1 comes with much more features … especially “Disconnect all users …”. This is exactly what we need to solve our Time Machine error! So you just need to open the 5.6.1 version of the AirPort Utility, open the Time Capsule with a double click and open the tab “Disks” and press the button “Disconnect all users …”.

In order to solve the problem like I described before, I had to work around an other problem: How to install the old AirPort Utility version 5.6.1 on my Mac running OSX 10.8 Mountain Lion?! The old AirPort-Utility version works well under 10.8, but the installation routine will not allow to install it. Luckily, Frank Tisellano helps us out with am Automator workflow to extract the App from the installation bundle. In my case I had to open the “AirPort Utility Extractor” Skript in Automator to run the commands in the terminal manually.

I hope, that howToFix saves one or the other some time …

Today, October 20th at 10 AM PST (07 PM CET), Apple invited the press to their “Back to the Mac” media event in Cupertino, California. iPhone, iPad and the iPod are quite important … but there sure are the MacBooks, MacBook Pros, the iMacs, the Mac Pros and the Mac OS X as a base for all the success. So it’ll be quite interesting to watch what Steve Jobs will present us today.
As Fortune reported, viewing the live stream requires Safari on Mac OS X 10.6 or an iPhone/iPod touch with iOS 3.0 or better … or an iPad.

Stay tuned for the Live Streaming URL.

[UPDATE] Here’s the live stream:

I had a lot of trouble with some rubygem warnings after upgrading to Ruby 1.9.1 and Rails 3.0 on Mac OS x Snow Leopard. They always occurred when I started the server within the project with the command

rails server

At first, when running on bundler 0.9.3, I had two types of errors. The first NoMethodError populated the terminal with hundreds lines of code, like …

WARNING:  # NoMethodError: undefined method ` ' for nil:NilClass 
# -*- encoding: utf-8 -*-
WARNING:  Invalid .gemspec format in \

The bundler-team around Carlhuda fixed that issue within bundler 0.9.4. So that problem will not occur any more.
The other problem was quite persistent. When starting the server via

rails server

or doing a test via


within the rails-3-project resulted in a bunch of warnings:

/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:14: \
warning: already initialized constant VERSION
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:14: \
warning: already initialized constant RubyGemsVersion
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:194: \
warning: already initialized constant MUTEX
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:196: \
warning: already initialized constant RubyGemsPackageVersion
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:202: \
warning: already initialized constant WIN_PATTERNS
 warning: already initialized constant MARSHAL_SPEC_DIR
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems.rb:1084: \
warning: already initialized constant YAML_SPEC_DIR
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/version.rb:72: \
warning: already initialized constant VERSION_PATTERN
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/requirement.rb:20: \
warning: already initialized constant OPS
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/requirement.rb:30: \
warning: already initialized constant OP_RE
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/version.rb:246: \
warning: already initialized constant Requirement
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:18: \
warning: already initialized constant TYPES
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/platform.rb:171: \
warning: already initialized constant RUBY
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/platform.rb:177: \
warning: already initialized constant CURRENT
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:39: \
warning: already initialized constant NONEXISTENT_SPECIFICATION_VERSION
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:50: \
warning: already initialized constant CURRENT_SPECIFICATION_VERSION
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:56: \
warning: already initialized constant SPECIFICATION_VERSION_HISTORY
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:72: \
warning: already initialized constant MARSHAL_FIELDS
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/specification.rb:75: \
warning: already initialized constant TODAY
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/source_index.rb:593: \
warning: already initialized constant Cache
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:14: \
warning: already initialized constant DEFAULT_BACKTRACE
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:15: \
warning: already initialized constant DEFAULT_BENCHMARK
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:16: \
warning: already initialized constant DEFAULT_BULK_THRESHOLD
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:17: \
warning: already initialized constant DEFAULT_VERBOSITY
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:18: \
warning: already initialized constant DEFAULT_UPDATE_SOURCES
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:24: \
warning: already initialized constant OPERATING_SYSTEM_DEFAULTS
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:30: \
warning: already initialized constant PLATFORM_DEFAULTS
/usr/local/lib/ruby/site_ruby/1.9.1/rubygems/config_file.rb:53: \
warning: already initialized constant SYSTEM_WIDE_CONFIG_FILE

Jeremy Kemper from the Rails core team pointed out that this is not a Rails problem, but a RubyGems issue. Ruby 1.9 ships with an outdated RubyGems … like 1.9.1p378 ships with RubyGems 1.3.1. I did update RubyGems to Version 1.3.5 by

sudo gem update --system

but this resulted in some duplicated rubygem files, which cause the error.

So how can the problem be solved? Deleting and reinstalling Ruby 1.9.1 does not have any effect … but the solution is quite simple:

If you already installed Ruby 1.9.1 and Rails 3.0 beta:

1. Be sure that you do NOT install RubyGems 1.3.5 separately after the installation of Ruby 1.9.1 – this would result in a double installation. So have that in mind when following the excellent instructions to installing Ruby, RubyGems, and Rails on Snow Leopard of Dan Benjamin.

2. If you already installed Ruby 1.9.1, updated to RubyGems 1.3.5 and bundler 0.9.4 and also installed Rails 3.0, the only thing you have to do is:

sudo gem uninstall rubygems-update

That’s it. No errors any more!

If you did not install Ruby 1.9.1 and Rails 3.0 yet …

1. You may start with Dan Benjamin’s recipe and modify it so you download, make and install the ruby-1.9.1-p378.tar.gz but NOT the rubygems-1.3.5.tgz.

2. Then update RubyGems with the command

sudo gem update --system

3. Ensure that the rake and the sqlite3-ruby gems are installed, too.

4. Now install the needed gems and rails –pre as described in the Rails 3.0 beta release notes

5. After the successful installation of Rails 3.0 beta, you now have to do the vitally important step:

sudo gem uninstall rubygems-update

6. Finally check, if any gem needs an update before diving into Rails 3.0 by

sudo gem update

Hope this helps … and saves some time. Thx Andy for the hint ;-)

Tim Pritlove talked about the iPhone and the native application development for that mobile phone with Martin Pittenauer and Dominik Wagner. Mac users may be aware of Martin and Dominik as the Coding Monkeys with their first Mac OS X masterpiece: SubEthaEdit, a collaborative text editor for the Mac. In 2008 the Monkeys also developed some iPhone applications, like Circulator or Big Clock. Tim, Martin and Dominik all together realized Blinkenlights Stereoscope a simulation of the Blinkenlights Installation Toronto 2008. That’s why they all can tell a lot of stories of the similarities and differences of programming for Mac OS X and the iPhone OS. Overall a great mixture for those interested in iPhone developement as well as experts.

The only downside for all international blog readers: The podcast is in German only. Here’s the link to the podcast!

In the last days, there is a lot of whispering: Here a Chinese iPod skin manufacturer publishes a small iPhone skin on his website, an analyst wishes for an iPhone for the mass marked … and bang, everybody is expecting an iPhone nano to be announced. Then the news is spreaded, that Steve Wozniak – second founder of Apple – will join the presentation of the newest modbook at the Axiotron booth at MacWorldExpo … it’s a MacBook transformed into a tablet Mac. That increases the desire and spins the rumor mill even faster for an iPod tablet or MacBook touch. However, the market positioning of such a multitouch-gadget will be tricky:

  • If Apple stays with the walled garden iPhone version of Mac OS X they would have the existing and vital iPhone developer community committed to multitouch and gesture control … and by the way an exclusive distribution channel for applications with the AppStore. The main focus probably would be gaming and entertainment. But the gadget will loose the “pants pocket factor”.
  • If Apple uses a full Mac OS X version they could use the experiences of Axiotron and have to count on the Mac OS X developers, that they implement the benefits and potentials of multitouch and gesture control within their (existing) applications. The gadget would be more like a “MacBook Air Touch” than an iPod tablet and would more likely suite and target the business customers. En passent this would explain why there is so little spectacular information about the new Mac OS X Snow Leopard features leaked out.

What ever Phil Schiller will present on his Keynote at the Moscow-Center at MacWorldExpo in San Francisco on January 6th … and what is hidden behind the concealed exhibition banners … I’m thrilled and I’m really looking forward to it ;-)

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