i want to mount all of my 5 partitions in different file formats i.e. ExFat, MS Dos, Mac OS (Journaled) in MBR or GUID Partition table , but I cannot do so. The last partition also fails to mount i.e disk2s6. So, I am unable to install Yosemite 10.10.1 dmg restored with USB in my Acer E5-571 33Ys laptop. The hardware specs of my laptop are as under. CPU: Intel Core i3-4030U Cpu @ 1.90 GHz. Chipset: Intel Haswell ULT, Socket 1168 BGA Motherboard: EA50_HB Graphics: Intel HD 4400 (Microsoft Basic Display Adapter) Ethernet: Gigabit Ethernet Wireless LAN: IEEE 802.11b/g/n Wlan: i) BT Atheros WB335 ii) BT4.0 BCM43142 iii) BT 4.0Atheros WB222 iv) Qualcom Atheros AR9287 Wireless Network Adapter (PCI- Express) Audio Card: Realtek ALC283 When I am making 4 or 5 partitions with Master Boot Record with different formats i.e. ExFat, MS Dos, Mac OS Journaled, I find the last partition is not mounting. The message is “Could not mount disk2s5 /disk2s6 with name Texts after erase”. As a result, essential.pkg could not be extracted and the installation fails in the 14th minutes remaining time period (i.e. before middle). If by luck the installation completes, I cannot see any bootloader icon to boot from the hard drive. Can you find a way out to make the installation successful? Also let me know how to install wify software for my above wify card in windows.