Macworld The next major cycle of Mac upgrades involves the M4 chip and it’s starting soon, according to reports. All of the M4 Macs aren’t being released at the same time, however, and since Apple doesn’t really stick to a set schedule like the iPhone or Apple Watch, it can be confusing to figure out when each Mac is coming and what kind of upgrades will be available. If the rumors are correct, every Mac in Apple’s lineup will get an update within the next 12 months. Here’s a guide for when each model will get the M4 chip, and what else to expect from each upgrade. M4 MacBook AirFoundry Releas…