Apple has announced an updated version of its flagship MacBook Pro series of notebooks. The new models feature improved processors as well as changes to the much maligned keyboard. Starting with the 15-inch model, the base variant gets a 2.6GHz 6-core 9th-generation Intel Core i7 processor, which can Turbo Boost up to 4.5GHz. The higher-end variant gets a 2.3GHz 8-core 9th-generation Intel Core i9 processor, making it the first MacBook to have an 8-core processor. Optionally, both models can also be configured with a 2.4GHz 8‑core 9th‑generation Intel Core i9 processor that...