Jobs' turnaround of Apple will become a textbook case in business schools for decades to come, according to Mac columnist Alex Salkever.

In his last ever column for Business Week Salkever writes: "I've learned a lot – not least that writing about Apple is a more consuming activity than covering any other technology company."

And he admits: "It's especially hard for me to walk away at a time when Apple's future looks brighter than ever."