In a letter on the Apple website, Bob Mansfield, the company's senior vice president of hardware engineering, said the company was putting its products back into the scheme.
Apple withdrew from the EPEAT (Electronic Product Environmental Assessment Tool) last week amid rumours that the company's new MacBook Pro with Retina Display would be unlikely to be awarded the scheme's top rating.
The thin design of the new MacBook Pro is said to make it difficult to recycle.
Following Apple's withdrawal, San Francisco's Department of Environment said the firm's computers would not longer qualify for purchases using city funds.
In his letter, Mr Mansfield emphasised Apple's green credentials as the maker of "the most environmentally responsible products in our industry". He added: "In fact, our engineering teams have worked incredibly hard over the years to make our products even more environmentally friendly, and much of our progress has come in areas not yet measured by EPEAT."
An environment status report on the MacBook Pro with Retina Display on Apple's website now says the laptop "achieves a Gold rating from EPEAT".
Source: The Telegraph
