It makes sense, since as you know (you should! :P) the feature is controlled by a Processor MSRs and Intel doesn’t change that from model to model… (the feature depends on Intel, not Apple….). Here you’ve got a screenshot of the app running on my MB air with Mojave public beta 3 and dark mode enabled.Ībout the app running on new Macbooks (2018), it just works fine allowing to enable / disable turbo boost without issues. That affected to many apps like Littlesnitch, but after reporting to Apple, they solved it on public beta 3 of Mojave (developer beta 4) :), so yes, the app is again working just fine with latest Mojave Beta! Mojave first betas suffered from one bug that was preventing the kernel extension from being loaded. Just writing this small post to let you all know :). I hope Apple agrees.In summary, yes, the app works fine, both free and pro, with latest Mojave Beta and also the new Macbooks Pro 2018. This is far from a solved problem, and far from any reasonable definition of “all-day” battery life. This won’t be worth doing all the time, but it’s nice to have the option.Īnd I’d still like to see higher battery capacity in normal operation. The MacBook Pro also runs noticeably cooler, and gains about 25% more battery life. While AnandTech’s “Light” test appears lighter than mine, neither of us could reach Apple’s “8 hour” claim for this model, which is disappointing.ĭisabling Turbo Boost hurts performance of CPU-intensive tasks by about a third, but doesn’t significantly slow down lighter tasks. My “Heavy” numbers with Turbo Boost line up well with the very similar 2013 model in AnandTech’s “Heavy” battery test, which gives me confidence in my test. When plugged in and fully charged, I also ran the Geekbench 32-bit single- and multi-core benchmarks, and observed the power range drawn from the wall with a Kill A Watt. Before running the test, the battery’s cycle count was just 2. I ran this test at 50% brightness (with auto-adjustment disabled), no keyboard illumination, and sound muted until the battery ran out and it shut down. For the moderately heavy load, the cycle also includes a clean and full compile of Overcast’s iOS app using xcodebuild every few minutes. I devised a simple battery-testing script to simulate light and moderately heavy loads on my brand new, mid-2014-generation, base-model 15-inch Retina MacBook Pro: it loads some popular websites in Safari over Wi-Fi, spending some time scrolling down each one, while playing music in iTunes, then appends the time and battery status to a file in Dropbox, which promptly gets synced. Turbo Boost Switcher can temporarily disable Turbo Boost, and I was curious to see if disabling it would meaningfully affect battery life. The advertised clock speed - 2.2 GHz for the base-model 15-inch - is only the guaranteed minimum. Modern Intel CPUs use Turbo Boost to dynamically increase CPU speed, depending on workload, up to their thermal limits. I used to eke more battery life out of my 2008 MacBook Air by underclocking and undervolting its CPU to a lower speed with CoolBook, but that’s no longer possible on modern Macs. The best battery life in the 15-inch Retina MacBook Pro line is the base model (without the high-powered GPU), but Apple’s stated 8–9 hours of battery life is only achievable with very light use - if you’re using tools like Xcode, Logic, or Lightroom, you’re lucky to get more than 4 hours. A programmer, writer, podcaster, geek, and coffee enthusiast.Ībout Disabling Turbo Boost to get more MacBook Pro battery life
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