Sd card slot malfunction

Hello,

I'm encountereing the problem in my imac mid 2011 21 inch since updating to Mavericks. I've even tried making a new user and trying from threre, but its the same. Only thing thats remaining is the clean install option. But thats time consuming and since I'm a bit busy, I cant do it immediately. I'll post its result when I do it.

For now the only solution that works for me is accessing the sd card from Windows 8 running in Parallels. But thats not the way its supposed to work.

Meanwhile here is the feedback i left to Apple.

Hi,

Ever since updating to Mavericks, I can no longer format cards in the sd card slot. I've tried sd, micro sd with adapters, and capacities of 4, 8 and 16 Gb. In most cards i can read the contents, e.g. photos etc. In some (4 Gb one) I can even delete stuff and make folders - i.e modify contents, but in all the cases i'm unable to format. I've tried the following methods-

1.Disk Utility

2.Terminal

3.Apps

In all the cases I've failed.

I've even tested the cards in other devices (including Raspberry PI, Digital Camera, Mobile phones and 2 windows laptops- a sony and dell). They work fine there.

I've also cleaned the slot by blowing air, tried various methods like slightly removing card, inserting with a little pressure, restarted with the cards inside but its the same.