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I just got a e6220 shipped with 32bit win7 pro. If you close the lid and reopen it, it crashes by default:) Although a driver and a firmware update solve the problem, I decide to switch to OS X. That's my purchase really for. I followed Herve's instruction (thanks a lot Herve) creating the usb installer for EI Capitan 19.11.4, tried twice but didn't get a bootable usb drive. I didn't alter the bios of my E6220 but my old snow leopard (D430) installer can boot to the boot menu, so I'm not sure if there anything need to change in my bios setting. I copped Enoch-rev.2795.pkg to the root dir of usb but not rename it, don't know if that's matter of not. In my iMac, this pkg cannot be open, says the developer is not recognized... I did a fdisk check, the usb is active. I put the kernel (10.11.4) to /System/Library/Kernels/ I copped Extra dir from E6220_i5-2520M_HD3000_EC-Pack.zip to the root dir of usb. I don't know if the file/dir ownership matters or not..... Don't know what to do/check, ....., Please help Thanks in advance =============== The contant of the USB ========== HMac:OS X Base System elim$ ls -la total 940408 drwxrwxr-t 24 elim staff 884 Apr 11 16:30 . drwxrwxrwt@ 6 root admin 204 Apr 11 16:52 .. -rw-r--r--@ 1 elim staff 8196 Apr 11 18:35 .DS_Store drwx------ 5 elim staff 170 Apr 11 16:03 .Spotlight-V100 d-wx-wx-wt 2 elim staff 68 Mar 12 00:46 .Trashes drwx------ 7 elim staff 238 Apr 11 16:49 .fseventsd drwxr-xr-x 2 elim staff 68 Aug 1 2015 .vol drwxrwxr-x+ 4 elim staff 136 Mar 12 00:44 Applications -rw-r--r--@ 1 elim staff 1948 Apr 11 16:21 BaseSystem.chunklist -rw-r--r--@ 1 elim staff 477579745 Apr 11 16:25 BaseSystem.dmg -rw-r--r--@ 1 elim staff 3620763 Apr 9 19:48 Enoch-rev.2795.pkg drwxr-xr-x@ 11 elim staff 374 Apr 9 15:20 Extra drwxr-xr-x 3 elim staff 102 Mar 11 18:27 Install OS X El Capitan.app drwxr-xr-x+ 11 elim staff 374 Mar 12 00:44 Library drwxr-xr-x+ 5 elim staff 170 Apr 11 16:47 System drwxrwxrwt 2 elim staff 68 Aug 1 2015 Volumes drwxr-xr-x 35 elim staff 1190 Mar 12 00:46 bin dr-xr-xr-x 2 elim staff 68 Feb 11 19:12 dev lrwxr-xr-x 1 elim staff 11 Mar 12 00:44 etc -> private/etc drwxr-xr-x 5 elim staff 170 Mar 12 00:44 private drwxr-xr-x 57 elim staff 1938 Mar 12 00:46 sbin lrwxr-xr-x 1 elim staff 11 Mar 12 00:44 tmp -> private/tmp drwxr-xr-x 8 elim staff 272 Mar 12 00:43 usr lrwxr-xr-x 1 elim staff 11 Mar 12 00:44 var -> private/var