Original sentence: Apple also offered an upgrade path in the form of a PowerPC  Macintosh Processor Upgrade.As with the 575, Apple also offered an upgrade path in the form of a PowerPC  Macintosh Processor Upgrade.This motherboard is essentially the same one used in the Macintosh Color Classic II, an upgrade to the original Color Classic not available in the United States
Edited sentence: Apple also offered an upgrade path in the form of a PowerPC  Macintosh Processor Upgrade and aggressively marketed it to assure a wary consumer of their investment.As with the 575, Apple also offered an upgrade path in the form of a PowerPC  Macintosh Processor Upgrade and aggressively marketed it to assure a wary consumer of their investment.This motherboard is essentially the same one used in the Macintosh Color Classic II, which was not available in the United States and is a popular upgrade to the original Color Classic, which is otherwise identical