can i install el capital on a 2009 imac running Yosemite

constantine240 Said:

"can i install el capital on a 2009 imac running Yosemite Can I install el capitan on a 2009 imac running yosemite"

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Yes, as it is compatible - Go Here: OS X El Capitan - Technical Specifications - Apple Support

To Install it, Try the Following:

• USB Bootable Installer:

Try installing through a USB Bootable Installer. Use a USB Flash drive that is 16GB in size, and use Terminal to create it (use the commands on the following link):

Go Here: How to Create a Bootable Installer for macOS - Apple Support

• Create a New Administrator:

Try a new administrator. If it works, then it is something misconfigured in your current user.

Go Here: Set up Users, Guests, and Groups on Mac - Apple Support

• Boot in Safe Mode:

Install through Safe Mode [Hold Down: shift key up boot]. In Safe Mode, login items are placed assed, along with particular changes.

Go Here: Start up your Mac in Safe Mode - Apple Support

Okay. That Early 2009 tops out with El Capitan.

What’s the particular error message diagnostic, and what have you tried?

Here is what Apple intends to happen here: How to upgrade to OS X El Capitan - Apple Support

constantine240 wrote:

I get an image on my desktop "InstallMacOSX-1.dmg image not recognized"

So to confirm, you double-clicked on that DMG file to open up the disk image, and failed to get access to the PKG installer within the mounted DMG? That’s Step 5 here: https://support.apple.com/en-us/HT206886

If that failed, delete the file and re-download, and look for another InstallMacOSX.DMG file around and delete that. Then re-download the file, and try again.

constantine240 wrote:

Thanks, I tried but it doesn't seem to work.

“Doesn’t seem to work” is a phrase that doesn’t tell us much past what we already know; that you’re having issues.

What happens when you try? What was the text of the messages or diagnostics that were shown? What have you tried?

Which 2009 iMac? Early and Mid 2009 top out at El Capitan, Late 2009 at High Sierra.

That .part file is a partial download. It either didn’t complete, or it’s still being downloaded.

Use the search box in a Finder window. Find all files with that name. Everywhere. Delete them all.

Then re-download. Using Safari preferably, then re-trying again with a different browser if the first download completes but fails to open. Preferably download from a working and stable (and wired) network connection too, though Apple’s servers are undoubtedly getting hammered right now.

Even once you get this installed, El Capitan will have problems connecting to the network. It’s old for secure connections.

Back up your data, check your applications for compatibility, and download El Capitan.

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