Cannot install the 5/4 Sims 4 update

Try locating the Download Cache Folder usually C:\ProgramData\Origin\DownloadCache and delete the files in there.  I did this and the download and install went through and I was able to play the game again.

Can't guarantee it will work for everyone but it worked for me....playing PC by the way.

I continued to have problems for several hours last night.  After signing out of Origin, rebooting my computer, and disabling my firewall, I tried again.  (I also deleted a recent download unrelated to Sims 4 at that time.)  When I again, attempted to download the update, it did download, but did NOT stop at 100%... I actually got as high as 130% download with no sign of the update actually installing.  After a 3rd sign out of Origin, another computer re-boot, and turning my firewall off again, I was able to install AND download the patch successfully, but not without having to pause the download several times once it reached more than 100% installed.  The pausing, in effect, backed up the download to a previous point.... say 80% installed, and resume from there until it reached a 100%+ installed point.  Again I would pause the download, and it would revert to a previous download point of.... say 85%, this time.  Through frequent pausing and resuming I was able to successfully download the update, and installing once the program stopped at EXACTLY 100%.

This shouldn't be this difficult.  ☹️

Try this:

The game doesn't update properly (failed or nothing happens)

(Credits)

1. Open Task Manager (right click on the bar at the bottom)
2. Open the 'Processes' tab (may vary depending on your OS)
3. Check if you have a proces ts4 running and if so, end it
4. The update should now download without crashing every time you go to retry.
   
   Source: http://answers.ea.com/t5/The-Sims-4/FAQ-Installation-Updating-and-Startup-Issues/td-p/4276949