Erratum, p. 149

In the “Using breakpoints” section, the paragraph immediately preceding Figure 8.12 says:

At this point, makeWarmer(:slight_smile: has not been called. I believe it should refer to MainWindowController’s applicationDidFinishLaunching(:slight_smile: method instead.

You are correct – thanks for pointing this out!

Two paragraphs later, beginning “In the variables view you will see three variables” and in Figures 8.11 and 8.12, all references to “aNotification” are displaying as “notification” under Xcode 6.3.2 (6D2105)