Apple used to offer such plans to individuals by combining it with a low-cost credit card offered by an Apple-affiliated bank. The cost was spread over many months, often 10 or 12 months, depending on the size of the balance. PROVIDED you NEVER were late or missed a payment, there was no additional interest added.
BUT-- if you were ever late or missed a payment, Interest accrued on the entire cost over the entire loan period, and you suddenly owed them a LOT more money, which they were happy to carry and have you pay additional payments on.
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I expect similar offers are now only provided through the Apple [Credit] Card.
This article may have more information:
Financing and Credit - Apple
note the "more info" link in the article
OR call the number leroydouglas suggested for more details.