iMac drive won't recognize blank dvd .. ejects it automatically after spinning for some time
Running macOS High Sierra ; mid 2011 desktop. Mac will read most DVD with content. Unreliable reading of CD with content that work fine on a neighbour's desktop.
Except for this CD/DVD drive, this has been a really reliable computer. I've not upgraded further as I have programs that I purchased that won't run on a higher system, and these programs have now gone to subscription which is not economically feasible for me.
I'm not particularly techie. I did run disk utility and everything was fine. Suggestions please?