My iMac will not upload software update.

[MacMurf55]

I was trying to upload the latest version of Apple OS and now my computer will not complete the install and I can’t get my mouse to move to click the ok button on the pop up that says: “An error occurred applying the software update”.
Can anyone help?

 

[Cory Cooper]

Hello and welcome.

-Which model Mac?
-Which version of OS X/macOS are you currently on?
-Is this an update to your current version, or an upgrade to a newer version of OS X/macOS?
-Do you know how much free space is left on the drive?

C