It's a simple beep, sometimes repeats at an interval for a few times, then stops. I did have a crash after one beeping episode, don't know if it's connected.
Late 2009 27 inch, Yosemite.
iMac, OS X Yosemite (10.10.2)
Hello Bayard,
Thanks for using Apple Support Communities.
Please use the support article below to help diagnose the startup tones your Mac is making.
About Mac computer startup tones
Take care.
Thanks, Alex...BUT...this is not a startup tone. It happened after the computer had been on for an hour or so, in an application.
I didn't time the beeps, nor count them. I'll do that if/when it happens again.
Maybe I should also say: this is the most unstable Mac I've ever had, and I've had quite a few. It had the HD warranty replacement, which helped some, but it's never been truly reliable...I've worn off the letter markings on command/S, because I've become a compulsive saver.
Now, I' wondering about a bad ROM...
Hi Bayard,
Thank you for clarifying the issue. Due to the nature of your issue or question you may find more information by using another one of Apple's support resources - https://getsupport.apple.com/GetproductgroupList.action
Take care.
I'm getting a beep at odd intervals, nothing appears on screen.
