I've been running 5.5 on my MacbookAir5,1 for some time. I'm trying to upgrade to 5.6 but I'm not having much luck so far.
A fresh install off a USB CD drive (ISOSTICK) proceeds until its time to copy the packages from the USB CD drive, but at that point no CD drive is visible. Next I tried installing by putting the machine into 'target disk mode' which allows me to connect it as a SATA drive to a virtual machine on another box. I'm able to install 5.6 that way, disconnect from the virtual machine, and boot up normally on the raw hardware. But when I plug in any USB device, be it a network adapter or storage device, neither are noticed by the OS at all--no message appears when they attached, nothing in dmesg, nothing new in the output from usbdevs. That said, the keyboard works, and it appears to be a USB device. Other devices like the EHCI root hubs, the Facetime HD Camera, and the Bluetooth USB Host Controller show up--its just the stuff plugged into either *external* USB port that aren't working. Which is a bummer, because I can't do much without a USB network adapter, since the internal wifi chipset is not supported. An old copy of the 5.5 dmesg is available here: http://marc.info/?l=openbsd-tech&m=138867402307945&w=2 I have the dmesg off of 5.6 as well...I plugged the machine back into the VM using target disk mode and copied it to a USB stick: OpenBSD 5.6 (GENERIC) #310: Fri Aug 8 00:14:24 MDT 2014 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC RTC BIOS diagnostic error df<clock_battery,ROM_cksum,memory_size,fixed_disk,invalid_time> real mem = 8475713536 (8083MB) avail mem = 8241348608 (7859MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xe0000 (54 entries) bios0: vendor Apple Inc. version "MBA51.88Z.00EF.B02.1211271028" date 11/27/2012 bios0: Apple Inc. MacBookAir5,1 acpi0 at bios0: rev 2 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP HPET APIC SBST ECDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT SSDT DMAR MCFG acpi0: wakeup devices P0P2(S4) PEG2(S4) EC__(S4) HDEF(S4) RP02(S4) ARPT(S4) RP05(S4) EHC1(S4) EHC2(S4) XHC1(S4) ADP1(S4) LID0(S4) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpihpet0 at acpi0: 14318179 Hz acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM) i7-3667U CPU @ 2.00GHz, 1895.95 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,LONG,LAHF,PERF,ITSC,FSGSBASE,SMEP,ERMS cpu0: 256KB 64b/line 8-way L2 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 99MHz cpu at mainbus0: not configured cpu at mainbus0: not configured cpu at mainbus0: not configured ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins ioapic0: misconfigured as apic 0, remapped to apid 2 acpiec0 at acpi0 acpimcfg0 at acpi0 addr 0xe0000000, bus 0-153 acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (P0P2) acpiprt2 at acpi0: bus -1 (PEG2) acpiprt3 at acpi0: bus 2 (RP02) acpiprt4 at acpi0: bus 3 (RP05) acpicpu0 at acpi0: C3, C1, PSS acpibat0 at acpi0: BAT0 model "3545797981023400290" type 3545797981528607052 oem "3545797981528673619" acpiac0 at acpi0: AC unit offline acpibtn0 at acpi0: LID0 acpibtn1 at acpi0: PWRB acpibtn2 at acpi0: SLPB acpivideo0 at acpi0: IGPU acpivout0 at acpivideo0: DD02 cpu0: Enhanced SpeedStep 1895 MHz: speeds: 2001, 2000, 1900, 1800, 1700, 1600, 1500, 1400, 1300, 1200, 1100, 1000, 900, 800 MHz memory map conflict 0xe00f8000/0x1000 memory map conflict 0xfed1c000/0x4000 memory map conflict 0xffe70000/0x30000 pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel Core 3G Host" rev 0x09 vga1 at pci0 dev 2 function 0 "Intel HD Graphics 4000" rev 0x09 intagp at vga1 not configured inteldrm0 at vga1 drm0 at inteldrm0 drm: Memory usable by graphics device = 2048M inteldrm0: 1366x768 wsdisplay0 at vga1 mux 1: console (std, vt100 emulation) wsdisplay0: screen 1-5 added (std, vt100 emulation) "Intel 7 Series xHCI" rev 0x04 at pci0 dev 20 function 0 not configured "Intel 7 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured ehci0 at pci0 dev 26 function 0 "Intel 7 Series USB" rev 0x04: apic 2 int 23 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 azalia0 at pci0 dev 27 function 0 "Intel 7 Series HD Audio" rev 0x04: msi azalia0: codecs: Cirrus Logic CS4206, Intel/0x2806, using Cirrus Logic CS4206 audio0 at azalia0 ppb0 at pci0 dev 28 function 0 "Intel 7 Series PCIE" rev 0xc4: msi pci1 at ppb0 bus 1 ppb1 at pci0 dev 28 function 1 "Intel 7 Series PCIE" rev 0xc4: msi pci2 at ppb1 bus 2 "Broadcom BCM43224" rev 0x01 at pci2 dev 0 function 0 not configured ppb2 at pci0 dev 28 function 4 "Intel 7 Series PCIE" rev 0xc4: msi pci3 at ppb2 bus 3 ppb3 at pci3 dev 0 function 0 vendor "Intel", unknown product 0x1547 rev 0x03 pci4 at ppb3 bus 4 ppb4 at pci4 dev 0 function 0 vendor "Intel", unknown product 0x1547 rev 0x03: msi pci5 at ppb4 bus 5 vendor "Intel", unknown product 0x1547 (class system subclass miscellaneous, rev 0x03) at pci5 dev 0 function 0 not configured ppb5 at pci4 dev 3 function 0 vendor "Intel", unknown product 0x1547 rev 0x03: msi pci6 at ppb5 bus 6 ppb6 at pci4 dev 4 function 0 vendor "Intel", unknown product 0x1547 rev 0x03: msi pci7 at ppb6 bus 55 ppb7 at pci4 dev 5 function 0 vendor "Intel", unknown product 0x1547 rev 0x03: msi pci8 at ppb7 bus 104 ppb8 at pci4 dev 6 function 0 vendor "Intel", unknown product 0x1547 rev 0x03: msi pci9 at ppb8 bus 105 ehci1 at pci0 dev 29 function 0 "Intel 7 Series USB" rev 0x04: apic 2 int 22 usb1 at ehci1: USB revision 2.0 uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1 pcib0 at pci0 dev 31 function 0 vendor "Intel", unknown product 0x1e56 rev 0x04 ahci0 at pci0 dev 31 function 2 "Intel 7 Series AHCI" rev 0x04: msi, AHCI 1.3 scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, APPLE SSD SM512E, CXM0> SCSI3 0/direct fixed naa.5002538043584d30 sd0: 477102MB, 512 bytes/sector, 977105060 sectors, thin ichiic0 at pci0 dev 31 function 3 "Intel 7 Series SMBus" rev 0x04: apic 2 int 18 iic0 at ichiic0 iic0: addr 0x2c 03=fc 05=6e 06=40 71=06 72=80 86=6b 90=38 91=1b 92=24 93=3d 94=69 95=3c 96=75 97=85 98=3d 9a=9f 9f=7c a0=7f a1=b5 a2=bf a3=7b a4=28 a5=cf a6=64 a7=2d words 00=0000 01=0000 02=00fc 03=fc00 04=006e 05=6e60 06=6000 07=0000 isa0 at pcib0 isadma0 at isa0 com0 at isa0 port 0x3f8/8 irq 4: ns8250, no fifo pcppi0 at isa0 port 0x61 spkr0 at pcppi0 nvram: invalid checksum uhub2 at uhub0 port 1 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 uvideo0 at uhub2 port 1 configuration 1 interface 0 "Apple Inc. FaceTime HD Camera (Built-in)" rev 2.00/80.25 addr 3 video0 at uvideo0 ugen0 at uhub2 port 1 configuration 1 "Apple Inc. FaceTime HD Camera (Built-in)" rev 2.00/80.25 addr 3 uhub3 at uhub1 port 1 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 uhub4 at uhub3 port 8 "Standard Microsystems product 0x2512" rev 2.00/b.b3 addr 3 uhub5 at uhub4 port 1 "Apple Inc. BRCM20702 Hub" rev 2.00/1.00 addr 4 uhidev0 at uhub5 port 1 configuration 1 interface 0 "Apple Computer product 0x820a" rev 2.00/1.00 addr 5 uhidev0: iclass 3/1, 1 report id ukbd0 at uhidev0 reportid 1: 8 variable keys, 6 key codes wskbd0 at ukbd0: console keyboard, using wsdisplay0 uhidev1 at uhub5 port 2 configuration 1 interface 0 "Apple Computer product 0x820b" rev 2.00/1.00 addr 6 uhidev1: iclass 3/1, 2 report ids ums0 at uhidev1 reportid 2: 3 buttons wsmouse0 at ums0 mux 0 ugen1 at uhub5 port 3 "Apple Inc. Bluetooth USB Host Controller" rev 2.00/1.47 addr 7 uhidev2 at uhub4 port 2 configuration 1 interface 0 "Apple Inc. Apple Internal Keyboard / Trackpad" rev 2.00/2.19 addr 8 uhidev2: iclass 3/1, 9 report ids ukbd1 at uhidev2 reportid 1: 8 variable keys, 6 key codes, country code 33 wskbd1 at ukbd1 mux 1 wskbd1: connecting to wsdisplay0 uhid0 at uhidev2 reportid 9: input=0, output=0, feature=3 uhidev3 at uhub4 port 2 configuration 1 interface 1 "Apple Inc. Apple Internal Keyboard / Trackpad" rev 2.00/2.19 addr 8 uhidev3: iclass 3/0, 68 report ids uhid1 at uhidev3 reportid 68: input=511, output=0, feature=0 ubcmtp0 at uhub4 port 2 configuration 1 interface 2 "Apple Inc. Apple Internal Keyboard / Trackpad" rev 2.00/2.19 addr 8 wsmouse1 at ubcmtp0 mux 0 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 005> SCSI2 0/direct fixed sd1: 477094MB, 512 bytes/sector, 977088773 sectors root on sd1a (44176e0c57bac2b8.a) swap on sd1b dump on sd1b clock: unknown CMOS layout