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Go from Snow Leopard to Mavericks, but 10.6.8 hangs @white logo screen

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Go from Snow Leopard to Mavericks, but 10.6.8 hangs @white logo screen

I've tried several times to upgrade from Snow Leopard 10.6.7 to 10.6.8 so I can get up to Mavericks. Every time I get 10.6.8 installed, the box won't finish booting. It just sits at the white Apple screen with logo.  No kernel panic, no black screen showing what's going on. Suggestions?


HP Pavilion a6400f Desktop PC Product Specifications

Product number - KJ379AA


Release date - 28-Feb-2008


Motherboard - ASUS IPIBL-LB (Benicia)


        Northbridge chipset: Intel G33 Express

        Southbridge chipset: Intel ICH9R


    Memory sockets: 4 x DDR2

    Front side bus speeds: 1333/1066/800 MHz

    Processor socket: 775


    Expansion Slots:

        1 PCI x16 slot for graphics card

        2 PCI x1 slots

        1 PCI slot


Pentium E2200

    Operating speed: Up to 2.2 GHz

    Number of cores: 2

    Socket: 775

   Bus speed: 800 MHz


Memory - 8 GB


EVGA nVidia Geforce 8400GS PCI-e video card


Integrated Audio ALC888S  7.1 channel high-definition audio


LAN: 10-Base-T

    Interface: Integrated into motherboard

    Technology: Realtek 8111C

    Data transfer speeds: up to 10/100 Mb/s

    Transmission standards:10-Base-T Ethernet


Modem: 56K WinModem


Hard drive: Western Digital 500 GB

    Interface: SATA

    Rotational Speed: 7200 RPM


CD/DVD disc drive: SuperMulti 16X DVD(+/-)R/RW 12X RAM (+/-)R DL LightScribe SATA drive


 Memory Card Reader

15-in-1 multimedia card reader

Supports the following cards:


    Compact Flash I;     Compact Flash II;  IBM Microdrive (MD);     Memory Stick (MS);   Memory Stick Duo;

    Memory Stick Pro (PRO);     Memory Stick Pro Duo (Pro Duo);     MultiMediaCard (MMC);     MultiMediaCard   

    Mobile (MMC mobile);     MultiMediaCard Plus (MMC plus);     Reduced size MultiMediaCard (RS-MMC);

    Secure Digital (SD);     Secure Digital miniSD (Mini);     Smart Media;     xD Picture Card (xD)


Computer Case

Mid-size ATX

    Height: 38.7 cm (15.23 inches)

    Width: 17.5 cm (6.89 inches)

    Length: 41.4 cm (16.29 inches)


Total Bays

2 x 13.33 cm (5.25 inch)

3 x 8.89 cm (3.5 inch)

1 x Pocket Media Drive

Power Supply 250W


Front I/O ports

    1394: 1

    USB: 2

    Headphone: 1

    Microphone: 1


Back I/O ports

1 - PS/2 mouse port (green)

2 - Coaxial SPDIF Out

3 - Video Graphics Adapter

4 - IEEE 1394a

5 - RJ45 Network (LAN)

6 - Audio: Center/Subwoofer (yellow orange)

7 - Audio: Rear Speaker Out (black)

8 - Audio: Line In (light blue)

9 - Audio: Line put (lime)

10 - Audio: Microphone (pink)

11 - Audio: Side Speaker Out (gray)

12 - USB 2.0 ports 1, 2, 3, and 4

13 - Coaxial SPDIF In

14 - PS/2 keyboard (purple)

Dell USB keyboard

HP USB optical mouse

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