Apple Financial Services (AFS) is hosting a promotion through until September 31.
Businesses that trade in old Macs to AFS get cash-back and the opportunity to lease a new Mac.
A £25 levy is deducted for carriage and insurance for the transportation of goods.
AFS offers a wide variety of programs designed to make it easier for homes, schools and businesses to acquire the latest technology.
John Singleton, sales director at AFS, said: "This promotion is ideal for the people wanting an upgrade, it's simple and hassle free.
He added: "At times we've been scared by the levels of demand."