If you can’t get the Mac App Store method of re-downloading the MacOS Mojave installer to work properly for whatever reason, then not to worry because there are other methods available. The same trick that is used to navigate around the mini-Mojave installer can also be used to download the full size macOS Mojave installer directly from MacOS. How to download the Mojave installer. And new apps was introduced with Snow Leopard and means that anyone with a Mac running Mac OS X 10.5 Leopard or earlier can’t actually access the Mac App. It's now been two days and I've rebooted my Mac a number of times, and have attempted installation many times. I also tried installing all other software updates in case that was a factor. They all updated fine without any problem. The only thing I can't do is get the Mojave installer to run because it is apparently 'damaged'. Because I wanted to wait a little longer to install the update, but my Mac had downloaded the installer automatically, I deleted the installation file 'Install MacOS Mojave.app'. Now I wanted to open the App Store to download the installer again, but here it says only 'Open' and no longer 'Download'.
Why won't macOS Catalina install on my Mac?This problem begins with the introduction of many users with macOS Catalina. And although the result of all, faced with it, one, causing its causes may be very different.Firstly, the macOS Catalina download may stop due to the lack of disk space, because the update requires at least 6 GB if you upgrade from Mojave or 23 GB from High Sierra. Therefore, before starting the update we recommend to make sure that there is free space. If the shortage became known during the installation, restart your Mac and press Control + R to enter the recovery menu, select Disk boot, then delete unnecessary files from the memory, and repeat the installation. Secondly, the inability to complete the download may occur due to the disconnection of the connection with Wi-Fi. To avoid this, it is recommended either to locate the upgraded computer in the immediate vicinity of the router, or to connect to the Network directly via Ethernet. If problems arise when installing an update located on an external drive via an adapter, try connecting it directly to the Thunderbolt port, or use another adapter. Perhaps this bandwidth was not enough. Unfortunately, problems are far from uncommon for most updates, but almost every one of them can be solved. The main thing is to know what manipulations should be made in order to restore the Mac to its former stability.
macOS Catalina gives you more of everything you love about Mac. Experience music, TV, and podcasts in three all-new Mac apps. Enjoy your favorite iPad apps now on your Mac. Extend your workspace and expand your creativity with iPad and Apple Pencil. And discover smart new features in the apps you use every day. Now you can take everything you do above and beyond.
Check compatibility
If you're using one of these computers with OS X Mavericks or later,* you can install macOS Catalina. Your Mac also needs at least 4GB of memory and 12.5GB of available storage space, or up to 18.5GB of storage space when upgrading from OS X Yosemite or earlier.
MacBook introduced in 2015 or later
MacBook Air introduced in 2012 or later MacBook Pro introduced in 2012 or later Mac mini introduced in 2012 or later iMac introduced in 2012 or later iMac Pro (all models) Mac Pro introduced in 2013 or later
* To upgrade from Lion or Mountain Lion, first upgrade to El Capitan, then upgrade to Catalina. To find your macOS version, Mac model, memory, and storage space, choose About This Mac from the Apple menu . If your Mac isn't compatible with macOS Catalina, the installer will let you know. View the complete list of compatible computers.
Make a backup
Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.
Get connected
It takes time to download and install macOS, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.
Download macOS Catalina
If you're using macOS Mojave, get macOS Catalina via Software Update: Choose Apple menu > System Preferences, then click Software Update.
Or use this link to open the macOS Catalina page on the App Store: Get macOS Catalina. Then click the Get button or iCloud download icon.
Begin installation
After downloading, the installer opens automatically.
Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.
Why Can't I Download Mojave On My Mac Air
If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.
Allow installation to complete
Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.
Stay up to date
After installing macOS Catalina, you will be notified when updates to macOS Catalina are available. You can also use Software Update to check for updates: Choose Apple menu > System Preferences, then click Software Update.
Or get macOS Catalina automatically
If you're using OS X El Capitan v10.11.5 or later and your App Store preferences or Software Update preferences are set to download new updates when available, macOS Catalina will download conveniently in the background, making it even easier to upgrade. A notification will inform you when macOS Catalina is ready to be installed. Click Install to get started, or dismiss the notification to install later. When you're ready to install, just open the file named Install macOS Catalina from your Applications folder.
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