Sep 26, 2018 Much like prior versions of Mac OS, you can easily create a bootable install drive for MacOS Mojave 10.14. These boot install drives allow for things like easily formatting a Mac to perform a clean install of macOS Mojave, installing macOS Mojave onto multiple Macs without them each having to download the installer, or even as a troubleshooting tool since it can be booted from by any.
Without enough space on the startup disk, your Mac is unable to do complete these tasks and ceases to function properly. When this happens, you normally end up with a beach ball cursor, slow load times, and an unresponsive machine. How much free space do I need on my startup disk? As a general rule of thumb, you should keep at least 10 GB free. Question: Q: full startup disk, despite deleting everything I have a macbook Air that is about 2 years old now. Recently I have been getting many notifications that my startup disk is full and so upon looking at the storage, I deleted all my movies, photos, files, and everything else that I found was taking up a lot of space. These heavy work files and data can lead to a situation where your mac will show you a message of ‘startup disk full’. For your Mac-OS to operate smoothly, it is important to have at least 10% free space. When there is no space left in the hard drive, your mac will start to slow down and will affect your work. Apple has included the ‘disk is almost full’ warning for a reason, as Mac OS does require free disk space to operate. In fact, you are better off keeping at least 15% of the disk capacity available at all times if you don’t want to start experiencing occasional hick-ups and errors. A newer software version is available: CleanMyMac X.Download CleanMyMac X free edition here step-by-step guide to make the “Startup D.
By default, your Mac starts up from its built-in hard disk, but a startup disk can be any storage device that contains an operating system compatible with your Mac. For example, if you install macOS on an internal or external drive, your Mac can recognize that drive as a startup disk. You can then follow the steps in this article to start up from it.
Use Startup Disk preferences
When you use Startup Disk preferences to select a startup disk, your Mac starts up from that disk until you choose a different one.
- Choose Apple menu > System Preferences, then click Startup Disk.
- Click the lock and enter your administrator password.
- Select your startup disk, then restart your Mac.
If you see a message that your security settings do not allow this Mac to use an external startup disk, check the External Boot setting in Startup Security Utility.
/Storage-5b33ac56c9e77c00373f5c80.jpg "Free Startup Disk Mac")
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Use Startup Manager
When you use Startup Manager to select a startup disk, your Mac starts up from that disk once, then returns to using the disk selected in Startup Disk preferences.
- Press and hold the Option (Alt) key immediately after turning on or restarting your Mac.
- Release the Option key when you see the Startup Manager window.
If your Mac is protected by a firmware password, you can release the key when you're asked to enter the password. - Select your startup disk, then click the arrow under its icon, or press Return.
If you press and hold the Control key during this step, your selection is saved in Startup Disk preferences, so it persists until you change it.
If your Mac is using OS X Lion 10.7.3 or later, you can also use this method to start up from your Time Machine backup disk. Startup Manager identifies your Time Machine backup as ”EFI Boot.”
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If you can't select your startup disk or start up from it
Check for these possibilities if you can't see your disk in Startup Disk preferences or Startup Manager, or your Mac won't start up from it.
Check for a compatible operating system on the startup disk
Make sure that your startup disk is using a version of macOS that is compatible with your Mac.
To start up from an external disk with macOS Catalina 10.15 or later, the disk must connect via USB-A, USB-C, or Thunderbolt, not FireWire.
Check startup security settings
If you're using a Mac that has the Apple T2 Security Chip, check the settings in Startup Security Utility. These settings determine whether your Mac can start up from another disk.
Check for Option ROM firmware
If you're in Startup Manager and can't see a third-party startup disk, the startup disk could be using Option ROM firmware. To enhance system security, Mac computers with up-to-date software don’t show devices that use Option ROM firmware until you load their firmware. To do that, press Option-Shift-Command-Period while in Startup Manager. If your startup disk appears, do that each time you want to start up from it or from another disk connected to it.
If you're using a firmware password, the ability to load Option ROM firmware is disabled as an additional security protection.
Ever since the release of Mac OS Lion the software upgrades for Macintosh computers are distributed through the online app store. Be it a clean install or upgrade, mac app store require you connect to the internet to download whole installation files. The online OS update is okay if you have stable broadband connectivity and enough bandwidth. Apple also provides an option for internet recovery of macOS if your computer fails to boot. But there are situations where you can’t download the OS from the Apple servers. Having a bootable macOS offline installation disk is the only solution in such scenarios.
How to make a macOS bootable USB installer
Mac Os Install Usb Boot Drive
It is possible to create a backup macOS installer on a DVD or USB drive but later is the best choice. Most of the Macs these days don’t have DVD slots, and the installation through a disc is very slow. Hence we discuss only about making macOS recovery installer on a USB disc. For this you need a Mac and a USB pen drive of at least 8 GB space, and a third-party app called DiskMaker.
- First, download a copy of Disk Maker from the official website.
- Choose a version as per your requirement. For example, if you want make USB installer for macOS Catalina 10.15, download Disk Maker X 9.
- I use an MacBook Pro with High Sierra. Hence, I’m downloading disk maker X 7.
- The next step is to download full macOS installer from the App Store to your Applications folder.
- Run Disk Maker DMG installer and copy the app to the Applications.
- The application will automatically detect the downloaded macOS as shown in the screenshot. Select “Use this Copy” if you would like to proceed with it.
- Next is setting the USB pen drive for creating the bootable installer. Choose the third option ” An 8 GB USB Thumb drive.”
- The app will list all drives in your system. Pick the one you would like use as macOS USB installer.
- Ignore the warning message and proceed to Erase and Create macOS USB disk. Don’t forget to provide your admin password when it prompts.
- Keep checking notifications tab for progress. When it completes you will find Install macOS Mojave (or High Sierra) mounted to your desktop as a USB disk.
- That’s your backup. Unmount and keep the USB installer to a safe place.
What is the alternative if I don’t have usable Mac at the moment?
Bootable Usb Drive Mac Os X Lion
This method is applicable when you have a Mac, and the internet recovery fails. But think about a situation when your only Mac stops to boot, and you don’t have USB installer or TimeMachine backup! Downloading Mac OS DMG file might save you. If you have a macOS DMG, you can create bootable USB disk from a Windows PC — use a software like TransMac for this purpose.
Clean installing or restoring a Mac offline with USB pen drive
As said earlier, you could use the macOS USB installer to do a clean install or restore it upon a boot failure. Just connect the USB disk and press the Option/Alt Key when you hear the boot sound. The Mac will then display all the startup disks available.
Usb Boot Drive Mac Os X
Pick the USB drive with the label “Install macOS Mojave or High Sierra” and follow on-screen instructions to complete the installation. If you need, use the Disk Utility to format the drive for doing a clean install.
There must be a message pops up from your Mac as 'your startup disk is almost full' which results in you searching on the internet for 'startup disk full Mac', right? While a search on the internet, you can see many people are asking the same questions and explain the bad results of startup disk full on Mac:
- The startup disk is full and Mac won’t start.
- I can’t delete files because the disk is full on Mac.
- The operation can’t be completed because the disk is full.
- It slows down the whole operating process, and some apps crashed regularly.
Since the startup disk full will cause so many problems, you must want to ask 'how do I free up space on startup disk on Mac', right? Let’s learn how to do it.
Part 1. Best Way to Free up Space on Startup Disk Swiftly
Before we get started, you must think about how you manage your phones and computer effectively or work more effectively. That’s using the software, right? There are many kinds of software tools developed to make our life simpler and easier. It is the same with how to free up space on the Startup disk. You can search for and download such software over the internet, making full use of it to fix the problems of your Mac.
To fix the problem of startup disk full on Mac, I recommend you try iBeesoft iCleaner. It is specially designed to help users to analyze their Mac, showing them how space is taken and what’s the size for each file types, making it easier for users to know to clean up Mac and solve the problems caused by Startup disk full on Mac. Here are some of its main features:
Your Safe & Effective Solve Startup Disk Full Mac Tool
- Less than 1 minute to analyze your Mac, showing you junk files and clutters as well as the file size.
- Supports removing almost all the junk files, including system junk, app junk, user junk, mail attachments(usually big ones), useless downloads, trash files, and other types of junk files.
- Fully compatible with macOS, even the latest version. Standalone, safe and easy to use, boost your Mac performs.
Here are the simple steps for how to make full use of iBeesoft iCleaner to solve the problem of the Mac startup disk is full. Click the Download button to get the latest version of the software. It is virus-free and safe, install it like you install other applications. Please note that it is not available at App Store yet, please set up your Mac system preferences as “install apps from trusted sources and App Store”. It’s fully compatible with all Macs, feel free to use it.
Step 1. Analyze Mac Startup Disk Space
Launch the software and from the main window, please click the 'Start Analyze' button at the lower bottom of the window. After then, you can see the software begins to work. Within a few minutes, it will show the total junk files it found and the size for each jun file.
Step 2. Select Junk Files to Free up Startup Disk
Next, select the file type(s) to clean by clicking it on the right side. After then, you can see the details for each type of junk files. Select unwanted ones to remove from your Mac.
Generally speaking, you can find files are useless in the Download folder and files are very big for mail attachment. Clean up these 2 first.
Part 2. How to Fix Startup Disk Full Manually (Taken Time and Energy)
If you know your Mac well, then you must know which types of files take too much space. After then, you can manually remove them from your Mac to free up space for the startup disk. Here is the list that might be helpful for you to manually fix the problem of startup disk is full:
Create Startup Disk For Mac
Step 1. Find which types of files take too much space on your Mac. You can see it by clicking the Apple icon on the very top left of the main window > select 'About This Mac' > 'Storage'.
Step 2. After step 1, you can make a cleanup Mac plan. To be honest, for most people, you can try the following cleanup tips:
a. Empty trash bin. It keeps deleted files for a long time there.
b. Find download folder and delete the downloads, including documents, apps, videos, etc.
c. Delete iPhone, iPad, iPod or any other device backups by launching iTunes > Go to the Menu Bar > iTunes > Preferences, find the device backups and remove them.
d, Delete Mail Downloads. It is a folder name, you can search for it.
Clean Up Startup Disk Macbook
e. Manage iTunes and remove duplicates by making use of the built-in feature.
Clean Startup Disk Mac Terminal
Step 1 and Step 2 only ensure you which types of files needed to be removed. As for logs, browsing history, cooks, cache, and more, I still recommend you try iBeesoft iCleaner. People manually really need more time looking for them, analyze them and remove them.