Does not work on Mac Mini M1

[fkellner]

Thank you for sharing your helpful script!
I tried it on a rented Mac Mini M1, and got the following output:

Architecture: arm64
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s): 8
Thread(s) per core: 1
Core(s) per socket: 8
Socket(s): 1
2023/07/07 11:40:05 Error executing command  sysctl -n machdep.cpu.vendor  :  exit status 1
Vendor ID: 
CPU family: 
2023/07/07 11:40:05 Error executing command  sysctl -n machdep.cpu.model  :  exit status 1
CPU Model: 
Model name: Apple M1
2023/07/07 11:40:05 Error executing command  sysctl -n machdep.cpu.stepping  :  exit status 1
Stepping: 
2023/07/07 11:40:05 Error converting CPU MHz to int:  strconv.Atoi: parsing "": invalid syntax
CPU MHz: 0
2023/07/07 11:40:05 Error converting CPU MHz to int:  strconv.Atoi: parsing "": invalid syntax
CPU max MHz: 0
2023/07/07 11:40:05 Error converting CPU MHz to int:  strconv.Atoi: parsing "": invalid syntax
CPU min MHz: 0
Hyper-Threading Technology: 
L1d cache: 64K
L1i cache: 128K
L2 cache: 4096K
2023/07/07 11:40:06 Error converting cache size to int:  strconv.Atoi: parsing "": invalid syntax
L3 cache: 0K
Flags: 

When I run e.g. sysctl -n machdep.cpu.model, the error is sysctl: unknown oid 'machdep.cpu.model'.

I don't know if I can be of any help debugging this since the M1 is only rented for a short time, but maybe you can add a caveat in your README.md that it only works for Intel Macs :)

[fkellner]

Found out that for Apple Silicon Macs, you can use sysctl hw to get info, output looks like this for me:

hw.ncpu: 8
hw.byteorder: 1234
hw.memsize: 8589934592
hw.activecpu: 8
hw.optional.arm.FEAT_AES: 1
hw.optional.arm.FEAT_BF16: 0
hw.optional.arm.FEAT_BTI: 0
hw.optional.arm.FEAT_CSV2: 1
hw.optional.arm.FEAT_CSV3: 1
hw.optional.arm.FEAT_DPB: 1
hw.optional.arm.FEAT_DPB2: 1
hw.optional.arm.FEAT_DotProd: 1
hw.optional.arm.FEAT_ECV: 1
hw.optional.arm.FEAT_FCMA: 1
hw.optional.arm.FEAT_FHM: 1
hw.optional.arm.FEAT_FP16: 1
hw.optional.arm.FEAT_FPAC: 0
hw.optional.arm.FEAT_FRINTTS: 1
hw.optional.arm.FEAT_FlagM: 1
hw.optional.arm.FEAT_FlagM2: 1
hw.optional.arm.FEAT_I8MM: 0
hw.optional.arm.FEAT_JSCVT: 1
hw.optional.arm.FEAT_LRCPC: 1
hw.optional.arm.FEAT_LRCPC2: 1
hw.optional.arm.FEAT_LSE: 1
hw.optional.arm.FEAT_LSE2: 1
hw.optional.arm.FEAT_PAuth: 1
hw.optional.arm.FEAT_PAuth2: 0
hw.optional.arm.FEAT_PMULL: 1
hw.optional.arm.FEAT_RDM: 1
hw.optional.arm.FEAT_SB: 1
hw.optional.arm.FEAT_SHA1: 1
hw.optional.arm.FEAT_SHA256: 1
hw.optional.arm.FEAT_SHA3: 1
hw.optional.arm.FEAT_SHA512: 1
hw.optional.arm.FEAT_SPECRES: 0
hw.optional.arm.FEAT_SSBS: 1
hw.optional.AdvSIMD: 1
hw.optional.AdvSIMD_HPFPCvt: 1
hw.optional.arm64: 1
hw.optional.armv8_1_atomics: 1
hw.optional.armv8_2_fhm: 1
hw.optional.armv8_2_sha3: 1
hw.optional.armv8_2_sha512: 1
hw.optional.armv8_3_compnum: 1
hw.optional.armv8_crc32: 1
hw.optional.armv8_gpi: 1
hw.optional.breakpoint: 6
hw.optional.floatingpoint: 1
hw.optional.neon: 1
hw.optional.neon_fp16: 1
hw.optional.neon_hpfp: 1
hw.optional.ucnormal_mem: 1
hw.optional.watchpoint: 4
hw.perflevel1.cpusperl2: 4
hw.perflevel1.l1dcachesize: 65536
hw.perflevel1.l1icachesize: 131072
hw.perflevel1.l2cachesize: 4194304
hw.perflevel1.logicalcpu: 4
hw.perflevel1.logicalcpu_max: 4
hw.perflevel1.physicalcpu: 4
hw.perflevel1.physicalcpu_max: 4
hw.perflevel0.cpusperl2: 4
hw.perflevel0.l1dcachesize: 131072
hw.perflevel0.l1icachesize: 196608
hw.perflevel0.l2cachesize: 12582912
hw.perflevel0.logicalcpu: 4
hw.perflevel0.logicalcpu_max: 4
hw.perflevel0.physicalcpu: 4
hw.perflevel0.physicalcpu_max: 4
hw.features.allows_security_research: 0
hw.cacheconfig: 8 1 4 0 0 0 0 0 0 0
hw.cachelinesize: 128
hw.cachesize: 3751329792 65536 4194304 0 0 0 0 0 0 0
hw.cpu64bit_capable: 1
hw.cpufamily: 458787763
hw.cpusubfamily: 2
hw.cpusubtype: 2
hw.cputype: 16777228
hw.ephemeral_storage: 0
hw.l1dcachesize: 65536
hw.l1icachesize: 131072
hw.l2cachesize: 4194304
hw.logicalcpu: 8
hw.logicalcpu_max: 8
hw.nperflevels: 2
hw.osenvironment: 
hw.packages: 1
hw.pagesize: 16384
hw.pagesize32: 16384
hw.physicalcpu: 8
hw.physicalcpu_max: 8
hw.serialdebugmode: 0
hw.tbfrequency: 24000000
hw.use_kernelmanagerd: 1
hw.use_recovery_securityd: 0
hw.targettype: J274

Probably difficult to render in lscpu style, since there are 4 fast and 4 slow cores w/ different cache sizes and clock speeds.

Found it here:
https://apple.stackexchange.com/questions/238777/how-do-i-identify-which-cpu-a-macbook-uses#answer-445882

[pncnmnp]

Wow, thanks for this! Yep, I'll include a caveat in the README for now. Thanks for the StackExchange link. I'll keep this issue open and see if I can add support for Apple Silicon.