I can't move my mouse cursor in El Capitan Beta 2

Question

Created Jun ’15

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This problem never happened before, but when I "upgraded" to El Capitan Beta 2, everything went as usual. I waited for like 10 minutes for the update to install, and it restarted, and took me to my login screen. There, I could move my mouse, and I logged in like normal.

It took me to the desktop, and reopened the App Store, because that is what I had open before the computer restarted. I moved my mouse cursor like halfway across the screen, I got the beachball for like a minute, and then it just sat there with the cursor on the screen.

I hard restarted the computer, and I booted up, and logged in, and then I had the same problem like before. Moved like halfway across the screen, beachballed for a minute, and then just sits there with the normal cursor.

I am wondering, I did a Time Machine backup in Beta 1. Is it possible to downgrade using the Recovery Assisstant by pressing Command+R while booting?

Thanks very much in advance for any help!

P.S: I have already tried reseting the SMC.

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Answer 1

Max108 OP

Jun ’15

Yes, you can, and probably should by the sound of it.

Here's the official support page for that:

https://support.apple.com/kb/PH18846?locale=en_GB

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Answer 2

Lance Nickel OP

Jun ’15

Okay, let me try. I will get back to you in a bit.

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Answer 3

Lance Nickel OP

Jun ’15

Here is the problem, when I boot into the recovery (Command+R), it freezes at like 2/3 the way through. The only way I am using my computer right now is through my Mavericks partition. Is it possible to restore the beta partition through Mavericks, or will I just have to wait for Beta 3 to come out, and hopefully solve the problem.

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Answer 4

Max108 OP

Jun ’15

Yes, it's possible. There's a few things to try first though:

Try booting into 10.11 DP2 using Safe Mode (assuming it is the OS that is booted into by default, hold the Shift key from when you power on until you see the progress bar under the Apple logo). If not then hold Shift from after you select it in the bootloader. Let me know if that works.
Try booting into Mavericks' RecoveryHD. Boot into the bootloader and if you can see a Recovery HD partition, it's very likely the Mavericks one because the RecoveryHDs of later versions of OS X have gone over to CoreStorage and are no longer visible there. I'm not sure if it will let you, but from there you can try to TimeMachine restore the 10.11 OS back to DP1.

Failing that, use Mavericks' Disk Utility to erase the abortive 10.11 install and the associated RecoveryHD partition.

Quit out of Disk Utility, and launch Terminal to type the following defaults write command:
defaults write com.apple.DiskUtility DUDebugMenuEnabled 1
Relaunch Disk Utility and look for “Debug” to appear alongside ‘Help’
Click on the new Debug menu and pull down and select “Show every partition” so that a checkmark appears next to it - this will allow you to see and erase the 10.11 Recovery HD partition too. If you can't distinguish it from your Mavericks' Recovery HD though, don't delete either.

Redownload 10.11 DP1 and install it on the freshly erased partition.

Boot into 10.11 DP1 and restore from the Time Machine backup (alternatively boot into Recovery - should now be 10.11 - and boot from there).

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Answer 5

tflo OP

Jun ’15

> when I boot into the recovery (Command+R), it freezes at like 2/3 the way through.

Have you been patient enough? I’ve seen something similar: The progress bar slowly went up to 1/4 or so, stalled for 2–3 minutes, suddenly jumped back to 1/8 or 1/10, at the same moment the color of the bar became darker, it went up again —a bit faster now— until ~1/2, and then the recovery screen opened.

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