Two main issues have come up for those who have updated to OS X El Capitan:
The Sims 3 – Those playing the disc version are experiencing the disc authorization error. This can be fixed by uninstalling your most recent EP/SP and downloading and installing the digital version through Origin. Instructions here.
The Sims 4 – Those who have Macs with a NVIDIA GeForce GT/GTX 6xxM 512 MB graphics card don’t seem to be able to properly play. The game is glitching, crashing and freezing. This only affects the GPUs with 512 MB VRAM.
There are threads on the officials and AHQ related to this. The Sims 4 El Capitan thread has been stickied and SimGuruJanitor has posted in it. As usual no other acknowledgement has been made so all we can do is hope that EA are still paying attention to it.
Bluebellflora 
I’ve been having that iMac El Capitan Disk Authorization Failure problem and my last resort is switching over to Origin 😦 I own most of the expansion packs but the most recent pack “Into the Future” my friend has redeemed onto her separate Origin account. I would play the game through the disk and she would play the game (same code) through her origin account on separate computers without having to purchase the game twice. Now by putting my games onto my separate Origin account, will it let me use the same code again since it was already registered with her Origin account? Would I have to purchase the game again to use it on origin?If this does not work, can I switch my operating system back to Yosemite and not get the problem??? Please help…
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You cannot register the same serial code on two separate accounts so yes, you would have to buy it again. I don’t know if reinstalling back to Yosemite will work.
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