Restart your Mac by pressing the power button for around 6 seconds (if this doesn’t work, try booting in Safe mode). If you see a black or blue screen that won’t go away, that’s a sign that your Mac probably froze trying to load a problematic app or login function. The startup only shows a blank screenĪ failed MacBook startup can show a few different colored screens, and each means something difference. Depending on your warranty, you may be able to get a replacement. If the SMC step doesn’t work and your Mac keeps on shutting down, it’s probably time to take it into an Apple Store. If something has gone wrong, resetting the SMC is a quick way to fix it. This controls many of the important hardware processes of your Mac, like battery charging, sleep modes, and more. Now try resetting your System Management Controller (SMC). This allows your MacBook to perform a healthy, full shutdown procedure. Once MacOS loads, choose to restart your Mac again. If this shutdown happens, restart your Mac with the power button and wait for it to power back on and load MacOS. This critical exploit could let hackers bypass your Mac’s defenses Little Snitch is a helpful app to block apps from “phoning home” without your knowledge.The biggest Mac announcement at WWDC was about the old MacBook Air If an app’s usage seems relatively high, you might want to investigate if an app is talking to the web server without your knowledge. The Network tab shows information about how your Mac is uploading and downloading network data. It also shows if it’s a 32- or 64-bit process. The Disk tab shows the amount of data that a process has read from and written back to your hard drive. The preventing sleep tab shows if an app is actually preventing the Mac from going to sleep on its normal schedule. App nap-enabled apps consume very little energy when they aren’t in the foreground. This section shows which apps support it. App nap is a relatively new feature to OS X. The average impact tab is a measure of the impact over the past 8 hours (or since startup if it’s been less than 8 hours). The impact tab is a measure of how a process is affecting energy consumption. The Energy tab is extremely useful for laptop users. Swap used is the space on your hard drive used by the Mac’s memory management process. Virtual memory is the amount of memory-address space that is being allocated for memory mapping. Memory used is the amount currently being used at the current time. Physical memory is the amount of RAM your Mac actually has installed. Toward the bottom, there’s a box with Physical Memory, Memory Used, Virtual Memory and Swap Used. As with the CPU tab, you can sort by many different options. The Memory section shows information about how your RAM is being used. You can sort by % to see which app is eating up the most of the processor capacity. I find that the % CPU section is the most helpful. If your fan is spinning on your Mac for no apparent reason, this is the section that you want to investigate. CPUĬPU shows how the processes are affecting the processor. The app is broken up into five different tabs: CPU, Memory, Energy, Disk, and Network. You can find the app inside the Applications/Utilities folder. This allows you to see how different programs and processes affect your Mac’s performance. The Mac’s Activity Monitor shows what is running on your Mac at any given time.
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