Original sentence: A lack of 32-bit cleanliness in applications became an issue for backward compatibility, and another minor headache for developers.Additionally, the Classic Macintoshes also used the high-order bits of the 24-bit address bus to reference peripheral devices, further limiting the amount of memory expansion available
Edited sentence: A lack of 32-bit cleanliness in applications became a major cause for elaborate system crashes - among other archaic problems with the Classic MacOS memory manager.Additionally, the Classic Macintoshes also used the high-order bits of the 24-bit address bus to reference perhipheral devices, further limiting the amount of memory expansion available