If you used the 'Skip App Verification' option, you have most likely selected an invalid app that doesnt contain the necessary files. It should be around 5GB in size. A: Check to make sure your Install macOS Sierra App is the correct one.Some may require technical skills during the process.For instance, you can uninstall Mac apps that get barely used, remove duplicates and similar files, transfer large old data (especially movies and photos) to an external backup drive, clean web browser junks, and empty Trash, etc.If you are new to Mac, we also recommend using CleanMyMac for efficiency. How to fix: clean up Mac driveThere are many manual fixes regarding this, at the price of taking your time thought. It is a best practice that we keep the free disk space at 20% level (minimum).If you can lighten the Mac drive and delete those unnecessary files, for example, system junk, duplicate files, unused third-party apps, etc., that will help optimize your Mac startup. The app has a feature that allows you to quickly identify those launch agents and disable them.Lack of storage is one of the main culprits for many computer performance issues, including slow startup.When your startup disk is almost full, the entire machine will run slowly. When you install an Amazon or Adobe app, its helper services are often pre-installed too.The worst part? They don’t show up under Login Items.How to find and remove them? One of the best ways is via CleanMyMac. Then select those items you don’t need to open up on startup, and click the minus “-” symbol.Meanwhile, don’t forget those launch agents (aka, app services that autorun and show up on Mac Menu Bar).For example, AmazonMusic, Adobe CreativeCloud Helper, etc.
Hold For Authentication High Sierra How To Do ItFirst, shut down your Mac, press the start key (or button).Then quickly hold these combination keys: Command + Option + P + R, right after you hear the startup sound. How to fix: reset NVRAMHere’s how to do it. NVRAM IssuesNVRAM, short for “Non-volatile Random Access Memory”, stores many pieces of information a Mac needs before it loads Apple’s macOS operating system.If the values in this memory get out of order for some reason, your Mac won’t start up correctly — one of the typical symptoms is your Mac takes forever to start up.Note: old Mac machines use PRAM, which is similar to NVRAM. How to fix: verify and repair disk using Disk UtilityGo to Finder > Applications > Disk Utility. In this case, it’s no surprise that the startup time will be affected. Macintosh Disk IssuesSometimes errors can hit Macintosh HD (or SSD), especially when your Mac shows its age (before 2012 models).If that applies to you, your Mac’s hard drive may act up, and the overall system performance is taxed. If you’re on an iMac or Mac Mini/Pro, the process is the same. So, I guess a major macOS update will slow down boot time. For example, it was super quiet when I updated from High Sierra to Mojave.However, my machine was excellent while upgrading from macOS 10.13.1 to 10.13.4. If your Mac is running with OS X El Capitan, macOS Sierra, High Sierra, or Mojave, you won’t see the two buttons, instead, just click First Aid and it will tell you whether disk repair is needed or not.It is in my experience that when I perform a macOS upgrade, my Mac machine boots up a bit slower though it’s not always the case. Download youtube playlists for free macHow to fix: upgrade to an SSDReplacing the spinning HDD with a new SSD (like Samsung 860 Pro) is perhaps the best way to speed up an old Mac, and significantly improve the startup time.There are many other benefits using an SSD versus an HDD, we won’t elaborate here as you can read more from this SSD upgrade article we put together.Alright, these are the seven possible reasons and fixes for troubleshooting the Mac slow startup issue.Hopefully, you’ve tried some of them, and have tuned up your Mac.Let us know if you have anything to add or questions about Mac slow startup, leave a comment below. If your Mac is not only slow on startup but sluggish on almost everything.More often than not, it’s time to check Mac drive health to get a sense of the chances of drive corruption and gauge how long the disk will stand. Hard drives are no exception. Mac Hard Drive Is FailingEvery technology has its lifespan, and eventually, it will fail. Subsequent restarts will help bring your Mac to average speed. 7.
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