Sony Xperia Sola- Error Flashing Stock Firmware With Flashtool

Hi guys I'm a newbie. My phone is Sony Experia Sola. I'm using latest FlashTool v0.9.19.8. I flashed two times successfully my phone and I'm trying to back official firmware(Android 4.0.4 - firmware 6.1.1.B.1.54) but when I tried Im getting ERROR - Error flashing. Aborted. I made two times this process but now I can't. I read a lot of thread about this error on the forum. Some people saying install drivers some people saying use the different machine. I dont have any PC Im a Mac user. There is no any drivers package just like the PC. Im really dont know how get over it this error. Please help me.

Also Im trying to check my phone boot locked or unlock with this code *#*#7378423#*#*. But when I write this number nothing happening. Its disappear. Normally I always seeing to system info. After CyanogenMod I cant see it anymore.

Now on my machine;
CyanogenMod 12.1 and Android 5.1.1

Should I open anything from developer options?

Here is my log;

Code:

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28/029/2015 06:29:47 - INFO  - Flashtool Version 0.9.19.8 built on 24-09-2015 22:00:00
28/029/2015 06:29:47 - INFO  - libusb version 1.0.20
28/029/2015 06:29:47 - INFO  - Executing search strategies to find proxy selector
28/029/2015 06:29:47 - INFO  - Proxy found for desktop
28/029/2015 06:29:48 - INFO  - Syncing devices from github
28/029/2015 06:29:48 - INFO  - Scanning devices folder for changes.
28/030/2015 06:30:01 - INFO  - Changes have been found. Doing a hard reset (removing user modifications).
28/030/2015 06:30:01 - INFO  - Pulling changes from github.
28/030/2015 06:30:02 - INFO  - Devices sync finished.
28/030/2015 06:30:06 - INFO  - Device disconnected
28/030/2015 06:30:43 - INFO  - Selected Bundle for Sony Xperia Sola (MT27i). FW release : 6.1.1.B.1.54. Customization : Global
28/030/2015 06:30:43 - INFO  - Preparing files for flashing
28/030/2015 06:30:58 - INFO  - Please connect your device into flashmode.
28/031/2015 06:31:06 - INFO  - Device connected in flash mode
28/031/2015 06:31:06 - INFO  - Opening device for R/W
28/031/2015 06:31:06 - INFO  - Device ready for R/W.
28/031/2015 06:31:06 - INFO  - Reading device information
28/031/2015 06:31:06 - INFO  - Phone ready for flashmode operations.
28/031/2015 06:31:06 - INFO  - Opening TA partition 2
28/031/2015 06:31:07 - INFO  - Current device : Unknown: Mar 28 2013/20:01:29 - BX903DA1EQ - Unknown: Mar 28 2013/20:01:29 - Unknown: Mar 28 2013/20:01:29 - Unknown: Mar 28 2013/20:01:29
28/031/2015 06:31:07 - INFO  - Closing TA partition
28/031/2015 06:31:07 - INFO  - Start Flashing
28/031/2015 06:31:07 - INFO  - Processing loader.sin
28/031/2015 06:31:07 - INFO  -    Checking header
28/031/2015 06:31:07 - INFO  -    Flashing data
28/031/2015 06:31:11 - INFO  - Loader : S1_Root_3065 - Version : R5E003 / Boot version : R10E013 / Bootloader status : ROOTED
28/031/2015 06:31:11 - INFO  - Max packet size set to 64K
28/031/2015 06:31:11 - INFO  - Making a TA backup
28/031/2015 06:31:11 - INFO  - Opening TA partition 1
28/031/2015 06:31:11 - INFO  - Start Dumping TA partition 1
28/031/2015 06:31:12 - INFO  - Finished Dumping TA partition 1
28/031/2015 06:31:12 - INFO  - TA partition 1 saved to /Users/MuratOzgul/.flashTool/registeredDevices/BX903DA1EQ/s1ta/2015-09-27_06-31-11/1.ta
28/031/2015 06:31:12 - INFO  - Closing TA partition
28/031/2015 06:31:12 - INFO  - Opening TA partition 2
28/031/2015 06:31:12 - INFO  - Start Dumping TA partition 2
28/031/2015 06:31:12 - INFO  - Finished Dumping TA partition 2
28/031/2015 06:31:12 - INFO  - TA partition 2 saved to /Users/MuratOzgul/.flashTool/registeredDevices/BX903DA1EQ/s1ta/2015-09-27_06-31-11/2.ta
28/031/2015 06:31:12 - INFO  - Closing TA partition
28/031/2015 06:31:12 - INFO  - Ending flash session
28/031/2015 06:31:12 - ERROR -
28/031/2015 06:31:12 - ERROR - Error flashing. Aborted
28/031/2015 06:31:13 - INFO  - Device connected in flash mode
28/031/2015 06:31:13 - INFO  - Device disconnected

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