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Installation fail please help

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Hi all, 

I have a lenovo B50-70, trying to install the Yosemite zone but the laptop keep restart after the flag boot menu and I can't find the right startup flags. Would you please help me? Here is the specification :


  • Processor: Intel Core i7-4510U 4th Generation (4M Cache, 2 GHz up to 3.10 GHz, 64-bit)
  • Memory: 6GB DDR3L 1600 MHz
  • Hard Drive: 1TB 5400 rpm
  • Graphics: AMD Radeon R5 M230 2GB Dedicated GPU
  • Display: 15.6 WXGA LED AntiGlare (1366х768)
  • Optical Drive: DVD±RW
  • webcam: HD 720p Webcam
  • Audio: Dolby Home Theatre v4
  • Ports: 1x USB 3.0, 2x USB 2.0 ports , Audio Combo Jack (headphone and mic), 2-in-1 (SD/MMC) card reader, HDMI,RJ45, VGA
  • Wireless: Wi-Fi: 802.11 b/g/n, Bluetooth: 4.0, LAN: 10/100/1000
  • Battery: 4 Cell, 32 Wh, 2200 mAh Lithium-Ion


Thanks in advance. 

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