Lee thanks for the post it sound like we have a similar problem, but many months apart.
I am having same issue. I use my slot loading super drive (see specs and model information below) to review learning DVD’s. I had no issues in Yosemite viewing my DVD’s. I upgraded to El Capitan about 2 months ago and tonight decided to review some DVD’s and behold “Insert disc (which, yes, works find in other DVD drives) and it spins it around back and forth for awhile and then spits it out”. Exact Same issue! I have read this entire thread and tried all of the “fixes” listed to no avail.
I am pretty sure the Computer knows it had a super drive, but it will not spin up. The disc never shows up in a finder window (Side bar view). In addition, when refreshing the system report window for my DVD drive, the window will not reload until the disc is spit back out. Furthermore, under about this Mac > storage the window shows the DVD drive is able to write in the following formats:
CD-R, CD-RW, DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-R DL, DVD+R DL
When I insert a Disc I can hear what sounds like the fans speed up, the “back and forth” sounds the optical drive usually makes before it spins up, and then nothing but an occasional “back or forth” movement for about 30 seconds. It is as if the Operating System is waiting on the hardware, but nothing happens. Could this be a driver issue of some kind?
This may be a bad optical drive. I will continue to try other endeavors for a few weeks. I do have a sneaky suspicion that this “could be” a software issue because of all the people I found (besides here) that say their optical drives are acting odd, or just not working after upgrading to El Capitan. Again, after I upgraded, two months ago, I too all of a sudden have a bad Super Drive? Odd, but my computer is old.
Just to be fair I have been using Macintosh since my Macintosh Plus (1990 came out in 88 couldn’t afford it new) and have seen Apples best and worst times. I also notice that with their recent (what 15 years now? I mean PPC blue and white came out in 99) influx of users (not power users) there are some really odd things people have tried. I did not try stuffing a credit/business card wrapped in a lens cloth into my slot loading optical drive as I know where the laser is and don’t want to bend any of the components on my specific iMac Model. If it worked for you great, I won’t do it.
I do not mean to put anyone down; that is not my point. My point is be careful of the amount misinformation on the internet. Like Windows back in the day there seems to be an expert on every corner. What is worse is all the websites that have popped up because of Apples popularity (no credentials for Mac stuff) running articles that can be detrimental to your system. Again, I just googled Superdrive Issues, among other things and saw this was an issues with Yosemite too.
I hope it is just software, but I bet a new external optical drive may be the cheapest scenario that or, have this one repaired (cha ching!), or completely wipe my system to see if this is software related. I however have not exhausted all avenues yet.
Other things I have tried:
Used a cleaning disk. (did not work)
Used compressed air (did not work)
Reset SMU and PRAM (4 times, did not work)
Tried multiple discs (Blank DVD’s, CD’s, Movie DVD’s)
Booting into a TechTool ProtoGo Yosemite USB drive (did not recognize a disc maybe because I did not have a DVD application installed. Will try another disc at a later date)
Booting into other user accounts (did not work)
Ran recovery, and tried disabling SIP (did not work)
Tried Capturing the Drive in VirtualBox (did not work)
Removed Plist, cleaned cashes, etc. ran maintenance scripts, reset permissions after disabling SIP, and after enabling SIP (nope, not working still).
Unrelated, or is it: Yes Photoshop CS6's intermittent crashing after installing El Capitan is the reason I found this issue tonight. LOL!
Model Name: iMac (27-inch, Late 2009)
Model Identifier: iMac11,1
Processor Name: Intel Core i7
Processor Speed: 2.8 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 12 GB
Processor Interconnect Speed: 4.8 GT/s
Boot ROM Version: IM111.0034.B04
SMC Version (system): 1.54f36
HL-DT-ST DVDRW GA11N:
Firmware Revision: KA19
Interconnect: ATAPI
Burn Support: Yes (Apple Shipping Drive)
Cache: 2048 KB
Reads DVD: Yes
CD-Write: -R, -RW
DVD-Write: -R, -R DL, -RW, +R, +R DL, +RW
Write Strategies: CD-TAO, CD-SAO, CD-Raw, DVD-DAO
Media: To show the available burn speeds, insert a disc and choose File > Refresh Information