Extra desktop appears on login

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Level 1

106 points

Extra desktop appears on login

I have an iMac, with a TV connected as an extra screen. This is set up in Sys Prefs > Displays as a second screen, with no mirroring.

I have 6 desktops in Mission Control.

Whenever I log in, a new desktop is created. If I don't delete it, it will still be there next time I log in, plus yet another new one. Sometimes I have ended up with half a dozen extra desktops ('cos I forgot to delete them earlier).

??? what is this about?

It's nuisance value only, but I do wish I didn't have to keep deleting unwanted desktops.

OS Yosemite (10.10.5)

iMac (27-inch, Late 2013), OS X Yosemite (10.10.4)

Posted on Oct 14, 2015 2:02 PM

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Answer 1

kharisma Author

Level 1

106 points

Oct 14, 2015 7:33 PM in response to kharisma

BTW, it doesn't seem to matter whether the TV is on or off when I turn on the computer. It's always the same behaviour, either way.

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Answer 2

kharisma Author

Level 1

106 points

Oct 17, 2015 5:39 AM in response to kharisma

Can anyone at least tell me whether creating a new desktop every time is normal behaviour?

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Answer 3

Eric Root

Level 10

685,335 points

Oct 17, 2015 11:52 AM in response to kharisma

No, it isn't normal. Unfortunately I don't have a suggested solution.

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Answer 4

kharisma Author

Level 1

106 points

Oct 19, 2015 7:48 PM in response to kharisma

After some discussion with an Apple rep, I have finally decided that it is probably a handshake issue, since the TV and the imac are connected via an HDMI cable.

The new desktop that is created is a copy of the desktop on the TV, and the issue only happens when the computer is starting up..

I occasionally have a handshake issue between the DVD player and the TV, and I suspect that this is what is also happening here.

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