Homebrew complements macOS (or your Linux system). Install your RubyGems with gem and their dependencies with brew. “To install, drag this icon” no more. Homebrew Cask installs macOS apps, fonts and plugins and other non-open source software. $ brew install -cask firefox. Making a cask is as simple as creating a formula. Oct 16, 2016 Depending on how you went about the work, installing Mac OS X on the new system may give you a message: OS X could not be installed on your computer. No packages were eligible for install. This is what it looks like in the installer. Upon seeing this I went 'HUH?' Restart your Mac again if necessary, and then go to System Preferences Date & Time. Click the lock icon and enter your password (if necessary) to enable changes. Then click Set date and time automatically. After this, try the installation again to see if it works.

How Do You Fix No Packages Were Eligible For Install
Macos Could Not Be Installed
Os X Could Not Be Installed No Packages Were Eligible

If your macOS Sierra won't install or you face the same problem with other versions, then don't worry. In this guide, we will teach what to do when macOS could not be installed on your computer. Restart and Reinstall Mac. Check Mac Date & Time. Free Up Mac Space.
OS X could not be installed on your computer No packages were eligible for install. Contact the software manufacturer for assistance. Quit the installer to restart your computer and try again.

A new version of macOS is always exciting. But it can quickly become frustrating if, instead of being presented with a brand new Mac, ready to use, you see an error message like “macOS could not be installed on your computer.” Fortunately, you can do lots of things to fix the problem, so let’s get started.

Before you try to install a new version of macOS

It’s essential that before you perform any major upgrade, say from Catalina to Big Sur, that you backup your Mac. One of the steps described below involves a complete reinstall of the operating system, resulting in erasing data from your drive. It’s best to do the backup using Time Machine, as you can then use Recovery Mode to restore your Mac from the backup. But if you don’t want to use Time Machine, create a bootable clone of your startup disk using a tool like SuperDuper or Carbon Copy Cloner.

Why does “macOS could not be installed on your computer” appear?

There are several reasons you might see this error message. Here are some of the most common.

Your Mac doesn’t support the version of macOS you’re trying to install
There was a problem downloading the installer
You don’t have enough space to install a new version of macOS
There’s a problem with the disk on your Mac
A piece of software like a launch agent or launch daemon is interfering with the upgrade

Before you try to fix the error

Check if your Mac is compatible with the version of macOS you’re trying to install. The best way to do that is to launch the App Store app, search for the macOS version you’re trying to install, and scroll down the Compatibility section. You should see a message that says, “works on this Mac.” Alternatively, go to Apple’s website support pages and search for the minimum system requirements. You might need to reboot in Safe mode, see below, to check because if you do a normal restart, your Mac may immediately relaunch the installer.

How to fix “macOS could not be installed on your computer”

1.Restart your Mac in Safe mode

Safe mode disables startup items, launch agents, and everything else except the bare minimum macOS needs to function. Restart your Mac from the Apple menu or by holding down the power button, and press Shift until you see the Apple logo.

2. Try running the installer again while in Safe mode

If the problem were that launch agents or daemons were interfering with the upgrade, Safe mode would fix that. If it works, you should restart your Mac normally after the installation and remove any launch agents and daemons you don’t need.

The simplest way to remove launch agents is to use CleanMyMac X.

Here’s how:

Download, install and launch CleanMyMac X.
Choose Optimization from the sidebar on the left.
Select View all items.
Check the box next to Launch Agents
Press Run.

3. Free up space

You’ll need up to 20GB of free space on your main drive to download and install an update to macOS. If you don’t have that much free space, it’s time to clear out the junk and free up space. I’ve found that the quickest and easiest way to do that is to use a popular app CleanMyMac X by MacPaw. It can free up tons of gigabytes of space with a couple of clicks.

Install CleanMyMac X, then launch it — download free edition here.

Choose Smart Scan from the sidebar.
Press Scan.
When it’s finished, press Run to delete files immediately or Review Details to see what it has found.

4. Reset the NVRAM

The NVRAM on your Mac stores data even after your Mac shuts down or restarts, unlike regular RAM, which is flushed every time you restart. NVRAM persists, thanks to a small amount of power supplied by your Mac’s internal battery. Resetting NVRAM rarely has any effect, but it can do in some situations, and as it won’t do any harm, it’s worth trying. It’s quite tricky to do, so that you might need some help.

Restart your Mac while holding the Command + Option (Alt) + P + R keys and wait until you hear a startup chime. It may take a little longer than normal to restart twice, but the NVRAM will have reset once it's done.

5. Try the combo updater

If you can restart in Safe mode and quit the installer, try downloading the combo updater from Apple’s website. The combo updater contains all the files necessary to install macOS on all Macs, whereas the version downloaded from the App Store only has the files for your specific Mac. It may be that the combo updater works, where the Mac App Store version doesn’t.

6. Install in Recovery Mode

This is the last resort if nothing else works.

Restart your Mac while holding Command + R until you see the Apple logo.
When you see the macOS Utilities window, you have two choices. You can either restore your Mac from a Time Machine backup if you have one, which will take you back to where you were before you started. Or you can Reinstall macOS.
Choose the option you want.
If you chose Reinstall macOS, wait for your Mac to restart, then go to System Preferences > Software Update and update your Mac to the latest available version.

There are a number of things you can do to fix your Mac when you see the message: “macOS could not be installed on your computer.” If the problem is that you don’t have enough space, you can use CleanMyMac X to get rid of files you don’t need. Otherwise, go through the above steps one at a time until you’re able to install a new version or update to macOS.

Troubleshooting Package Installation and Update

This appendix shows how to handle some errors that you mightsee when you install or update packages. This appendix also provides tips forincreasing performance and minimizing stored metadata.

Initial Troubleshooting Steps

Check whether the package you want to install is available from configuredpublishers and can be installed in this image. The installed version ofpkg:/entire and the publisher origins configured in thisimage are required pieces of information. You might need to update thepkg:/entire package. You might need to modify publisherorigins.

The following two checks should be done first for almost any package installation problem:

Check which version of the pkg:/entire incorporation package isinstalled.
Check your package publisher origin.

When you have determined that the packages you need are available fromconfigured publishers, use the following steps as you proceed with yourinstallation:

Use the -nv options whenever you install or update tosee what changes will be made, such as which versions of which packages will beinstalled or updated and whether a new BE will be created. The-v option also shows any release notes that apply to thisparticular installation or update

Os X Could Not Be Installed No Packages