Sep 27, 2018 Open up the App Store in your current version of macOS, then search for macOS Mojave. Click the button to install, and when a window appears, click 'Continue' to begin the process. Mojave has come to public for quite a long time, also with the release of macOS Catalina, many users are excited to see and experience its impressive features. If you have installed Mojave or Catalina, you may have to reinstall macOS for some reasons. But how to redownload Mojave or Catalina or earlier macOS. Jan 03, 2020 As expected, Apple has started shipping new Macs with macOS 10.15 Catalina. We’re still hesitant to recommend upgrading to Catalina, particularly if you use Mail, since reports of email data loss continue.Luckily, downgrading a new Mac from Catalina to 10.14 Mojave is possible for models other than the 16-inch MacBook Pro and the 2019 Mac Pro. Apr 24, 2020 For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of the Mac operating system. If you still need macOS Mojave, use this App Store link: Get macOS Mojave.
Longtime macOS users will know that even though the Mac has a built-in recovery partition, it’s always useful to have a dedicated USB drive with a macOS installer. I am a big fan of using a tool like DiskMaker X to create them to keep around if I need to wipe a drive and reinstall macOS quickly. If you have a drive created for Mojave, Sierra, and High Sierra, know that a certificate has expired. If you are getting an error similar to “This copy of the Install macOS Mojave.app application is damaged, and can’t be used to install macOS”, read on to learn how to fix it.
If you’re getting the above error message when you go to install macOS, you’ll likely experience some panic about what to do. Thankfully, it’s an easy fix. As first reported by OSXDaily.com, a fix is quite simple.
The cause of this error is an expired certificate, and because the certificate is expired, the “Install macOS” app for Mojave, Sierra, and High Sierra will not run. Fortunately, there is a fairly simple solution to the “damaged” installer problem.
Redownload Mojave Installer
Below are the download links for the recent versions of macOS.
You may need to reboot the Mac after you have downloaded the new (and valid certificate) installer application, particularly if you had already launched a version that showed the application damaged error message.
If you are new to making macOS boot drives, we’ve got articles to help.
Another benefit to making a new boot drive is that you’ll get all of the various macOS updates that have been released since you made your last one. It’ll make your installation process a lot faster if you are recovering from a dead hard drive, since you won’t need to install macOS and then apply patches right afterward. While the process of repairing the “This copy of the Install macOS Mojave.app application is damaged, and can’t be used to install macOS” isn’t fun, thankfully, it’s easy.
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macOS Mojave is here and by now you may have installed it and started playing with some of its new features, like the new Continuity Camera that lets you use your iPhone as a scanner on your Mac, or the new Gallery view in Finder, or maybe the new screenshot tools.
However, it’s also possible, given that macOS Mojave is a very new release and still being fine tuned by Apple, that you’ve run into problems and need to reinstall. Thankfully, that’s very easy to do. Before we get to that, however, it’s worth eliminating one other possible cause of the problems you may be experiencing.
When you install an OS on top of another OS, and then do the same the following year when the next version comes out, your Mac accumulates lots and lots of files that it doesn’t need. These are added when applications are installed, when they’re run, and when applications like Photos, Safari, and iTunes are used. Over time these junk files can hamper the performance of your Mac. The solution is to give your Mac a cleanup. We recommend CleanMyMac X. It scans your Mac for junk files and recommends to delete them safely. It can claw back tens of gigabytes of disk space, and improve your Mac’s performance. Give it a go, you can download it for free here, and see how much disk space it can give you back.
Before you reinstall macOS Mojave
There are two types of reinstallation. One installs a new copy of macOS Mojave over the current version and leaves everything else intact. The other erases your entire startup disk and installs a clean version of Mojave. The latter is more likely to fix problems and help your Mac run faster, but you’ll have to reinstall all your applications and reconfigure all your settings.
Whichever of the two options you choose, you should back up your Mac first. If you use Time Machine to backup to an external disk or a network drive, you can restore all your applications and settings from that backup after you reinstall macOS Mojave. If you plan to run a clean reinstallation, that’s definitely the simplest route. If you prefer not to use Time Machine, you can use any other backup application, or clone your entire disk.
If you’re reinstalling because you’re going to sell or give away your Mac, you should sign out of iCloud, iTunes, and iMessage first, then run a clean installation.
How to reinstall macOS Mojave
Once you’ve backed up your Mac, you’re ready to begin the reinstallation process.
The simplest way to install macOS Mojave, and the method that Apple recommends, is to go to the App Store, find Mojave in the Quick Links section on the right hand side of the front page, click it and then follow the instructions to download and install it.
1. Restart your Mac using one of the following keyboard commands:
Command+R — this will reinstall the version of the OS that was most recently installed on your Mac.
Command+Option+R — this will reinstall the latest version of the OS that is compatible with your Mac.
How To Redownload Installer For Macos Mojave Vista
2. When the macOS window appears, if you’re not performing a clean installation, skip to step 7.
3. Click on Disk Utilities and choose the Erase tab.
4. Give your disk a name, choose APFS or Mac OS Extended (Journaled), and if Scheme is available, set it to GUID Partition Map.
5. Press Erase.
6. When it’s finished, quit Disk Utility to go back to macOS Utilities.
7. Choose Reinstall macOS.
How To Re-download Macos Mojave Installer (from Macos Mojave)
8. Click Continue and follow the instructions. You’ll be asked to choose the disk you want to install macOS Mojave on, if you down’t see your startup disk, select Show All Disks.
9. Select Install and wait for the installation to complete and your Mac to restart.
If you ran a clean installation, you’ll be taken to the Setup Assistant to go through the process of reconfiguring your Mac. If you made a Time Machine backup before reinstalling, make sure it’s connected.
How To Redownload Installer For Macos Mojave Mac
During setup, you’ll be asked if you want to transfer data from another Mac or a backup. Choose that option then navigate to the Time Machine backup to restore data. You’ll be given the option to transfer any or all of: Applications; user accounts; other files and folders; and computer and network settings. Choose the option you want and press Continue.
If you don’t transfer data during setup, you can do it at any time using Migration Assistant in Applications>Utilities.
How To Redownload Installer For Macos Mojave Pc
Reinstalling macOS Mojave is very easy. Just make sure you backup your Mac first and download CleanMyMac X(free version) to give it a good clean up!