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Output of “${OSTYPE:6}” on old releases of Mac OS X
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I'm writing a shell script that I want to be theoretically compatible with very old versions of Mac OS X (I say "theoretically", because I lack any super-old machines to actually test with). The script uses the output of ${OSTYPE:6} to determine which release of Mac OS X it's running on.
On a machine running 10.13 High Sierra, echo ${OSTYPE:6} returns 17. On a machine running 10.10 Yosemite, it returns 14. Logic thus suggests that the command would output "15" on 10.11 and "16" on 10.12.
(This is useful, because it allows me to include lines like if [[ ${OSTYPE:6} -ge 14 ]]; then DoThing; fi to run DoThing on any system running Yosemite and newer.)
Does this pattern hold for old releases as well? For example, would the command return "4" on the original 10.0?
I ask because, well, it would be odd to start at 4, so I'm worried that somewhere in history, the number was incremented by a point update.
macos
asked 9 hours ago
WowfunhappyWowfunhappy
1,42811231
add a comment |
I'm writing a shell script that I want to be theoretically compatible with very old versions of Mac OS X (I say "theoretically", because I lack any super-old machines to actually test with). The script uses the output of ${OSTYPE:6} to determine which release of Mac OS X it's running on.
On a machine running 10.13 High Sierra, echo ${OSTYPE:6} returns 17. On a machine running 10.10 Yosemite, it returns 14. Logic thus suggests that the command would output "15" on 10.11 and "16" on 10.12.
(This is useful, because it allows me to include lines like if [[ ${OSTYPE:6} -ge 14 ]]; then DoThing; fi to run DoThing on any system running Yosemite and newer.)
Does this pattern hold for old releases as well? For example, would the command return "4" on the original 10.0?
I ask because, well, it would be odd to start at 4, so I'm worried that somewhere in history, the number was incremented by a point update.
macos
asked 9 hours ago
WowfunhappyWowfunhappy
1,42811231
For some older versions, it returns a dotted number pair. On OS X 10.6.8 I get "10.0", and on OS X 10.3.9 I get "7.0". Unfortunately, that meansbashcan't do numeric comparisons on it in these versions.
– Gordon Davisson
6 hours ago
add a comment |
I'm writing a shell script that I want to be theoretically compatible with very old versions of Mac OS X (I say "theoretically", because I lack any super-old machines to actually test with). The script uses the output of ${OSTYPE:6} to determine which release of Mac OS X it's running on.
On a machine running 10.13 High Sierra, echo ${OSTYPE:6} returns 17. On a machine running 10.10 Yosemite, it returns 14. Logic thus suggests that the command would output "15" on 10.11 and "16" on 10.12.
(This is useful, because it allows me to include lines like if [[ ${OSTYPE:6} -ge 14 ]]; then DoThing; fi to run DoThing on any system running Yosemite and newer.)
Does this pattern hold for old releases as well? For example, would the command return "4" on the original 10.0?
I ask because, well, it would be odd to start at 4, so I'm worried that somewhere in history, the number was incremented by a point update.
macos
asked 9 hours ago
WowfunhappyWowfunhappy
1,42811231
I'm writing a shell script that I want to be theoretically compatible with very old versions of Mac OS X (I say "theoretically", because I lack any super-old machines to actually test with). The script uses the output of ${OSTYPE:6} to determine which release of Mac OS X it's running on.
On a machine running 10.13 High Sierra, echo ${OSTYPE:6} returns 17. On a machine running 10.10 Yosemite, it returns 14. Logic thus suggests that the command would output "15" on 10.11 and "16" on 10.12.
(This is useful, because it allows me to include lines like if [[ ${OSTYPE:6} -ge 14 ]]; then DoThing; fi to run DoThing on any system running Yosemite and newer.)
Does this pattern hold for old releases as well? For example, would the command return "4" on the original 10.0?
I ask because, well, it would be odd to start at 4, so I'm worried that somewhere in history, the number was incremented by a point update.
macos
macos
asked 9 hours ago
WowfunhappyWowfunhappy
1,42811231
asked 9 hours ago
WowfunhappyWowfunhappy
1,42811231
edited 8 hours ago
Wowfunhappy
asked 9 hours ago
WowfunhappyWowfunhappy
1,42811231
asked 9 hours ago
WowfunhappyWowfunhappy
1,42811231
asked 9 hours ago
WowfunhappyWowfunhappy
1,42811231
1,42811231
For some older versions, it returns a dotted number pair. On OS X 10.6.8 I get "10.0", and on OS X 10.3.9 I get "7.0". Unfortunately, that meansbashcan't do numeric comparisons on it in these versions.
– Gordon Davisson
6 hours ago
add a comment |
For some older versions, it returns a dotted number pair. On OS X 10.6.8 I get "10.0", and on OS X 10.3.9 I get "7.0". Unfortunately, that meansbashcan't do numeric comparisons on it in these versions.
– Gordon Davisson
6 hours ago
For some older versions, it returns a dotted number pair. On OS X 10.6.8 I get "10.0", and on OS X 10.3.9 I get "7.0". Unfortunately, that means
bash can't do numeric comparisons on it in these versions.– Gordon Davisson
6 hours ago
For some older versions, it returns a dotted number pair. On OS X 10.6.8 I get "10.0", and on OS X 10.3.9 I get "7.0". Unfortunately, that means
bash can't do numeric comparisons on it in these versions.– Gordon Davisson
6 hours ago
add a comment |
3 Answers
3
active
oldest
votes
That sounds very much like it's returning the Darwin version.
Your theory works well from 10.15 Mojave [18] back to 10.2 Jaguar [6] but fails before that, as Darwin was 1.x.x at that point.
There's a full list at Wikipedia - macOS
answered 9 hours ago
TetsujinTetsujin
63.4k15107205
1
$OSTYPE is a z shell parameter which is derived fromuname -r.
– fd0
8 hours ago
1
@fd0 - that may as well be Martian ;-)
– Tetsujin
8 hours ago
add a comment |
Apple stores version information in Core Foundation and here is the source code showing how they build to each version.
- https://opensource.apple.com/source/DarwinTools/DarwinTools-1/sw_vers.c.auto.html
I’d use sw_vers to get your version information if you’re scripting rather than use uname or other variables.
answered 8 hours ago
bmike♦bmike
164k46300643
Wouldsw_verswork in a shell script?
– Wowfunhappy
8 hours ago
It’s in the path of all the shipping shells on macOS / OS X / Darwin, so yes @Wowfunhappy it will work well.
– bmike♦
8 hours ago
Thanks. I remember why I didn't use this now—because it doesn't output an integer likeOSTYPE:6, I can't use a simple -ge / -le checks to isolate "this version and everything newer/older"
– Wowfunhappy
8 hours ago
@Wowfunhappy Aren’t the build numbers monotonically increasing and sortable as strings? I think there’s an entire python library / module to handle this iirc - it’s pyfacts - github.com/timsutton/python-macadmin-tools
– bmike♦
8 hours ago
Ah, Finlay Doobie, who fixed a bug in OS X that escaped Apple's software engineers for over a year - wired.com/2002/03/apple-ousts-coder-for-being-young
– fd0
7 hours ago
add a comment |
I don't have a 10.0 machine to test on, but on a 10.3 machine, echo ${OSTYPE:6} returns a blank line; on 10.6, it returns 10.0.
(Incidentally, your shell script would need to explicitly invoke bash. The default shell on very old versions of OSX is tcsh, which doesn't understand the ${OSTYPE:6} syntax.)
answered 1 min ago
MarkMark
1397
add a comment |
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
That sounds very much like it's returning the Darwin version.
Your theory works well from 10.15 Mojave [18] back to 10.2 Jaguar [6] but fails before that, as Darwin was 1.x.x at that point.
There's a full list at Wikipedia - macOS
answered 9 hours ago
TetsujinTetsujin
63.4k15107205
1
$OSTYPE is a z shell parameter which is derived fromuname -r.
– fd0
8 hours ago
1
@fd0 - that may as well be Martian ;-)
– Tetsujin
8 hours ago
add a comment |
That sounds very much like it's returning the Darwin version.
Your theory works well from 10.15 Mojave [18] back to 10.2 Jaguar [6] but fails before that, as Darwin was 1.x.x at that point.
There's a full list at Wikipedia - macOS
answered 9 hours ago
TetsujinTetsujin
63.4k15107205
1
$OSTYPE is a z shell parameter which is derived fromuname -r.
– fd0
8 hours ago
1
@fd0 - that may as well be Martian ;-)
– Tetsujin
8 hours ago
add a comment |
That sounds very much like it's returning the Darwin version.
Your theory works well from 10.15 Mojave [18] back to 10.2 Jaguar [6] but fails before that, as Darwin was 1.x.x at that point.
There's a full list at Wikipedia - macOS
answered 9 hours ago
TetsujinTetsujin
63.4k15107205
That sounds very much like it's returning the Darwin version.
Your theory works well from 10.15 Mojave [18] back to 10.2 Jaguar [6] but fails before that, as Darwin was 1.x.x at that point.
There's a full list at Wikipedia - macOS
answered 9 hours ago
TetsujinTetsujin
63.4k15107205
answered 9 hours ago
TetsujinTetsujin
63.4k15107205
answered 9 hours ago
TetsujinTetsujin
63.4k15107205
answered 9 hours ago
TetsujinTetsujin
63.4k15107205
63.4k15107205
1
$OSTYPE is a z shell parameter which is derived fromuname -r.
– fd0
8 hours ago
1
@fd0 - that may as well be Martian ;-)
– Tetsujin
8 hours ago
add a comment |
1
$OSTYPE is a z shell parameter which is derived fromuname -r.
– fd0
8 hours ago
1
@fd0 - that may as well be Martian ;-)
– Tetsujin
8 hours ago
1
1
$OSTYPE is a z shell parameter which is derived from
uname -r.– fd0
8 hours ago
$OSTYPE is a z shell parameter which is derived from
uname -r.– fd0
8 hours ago
1
1
@fd0 - that may as well be Martian ;-)
– Tetsujin
8 hours ago
@fd0 - that may as well be Martian ;-)
– Tetsujin
8 hours ago
add a comment |
Apple stores version information in Core Foundation and here is the source code showing how they build to each version.
- https://opensource.apple.com/source/DarwinTools/DarwinTools-1/sw_vers.c.auto.html
I’d use sw_vers to get your version information if you’re scripting rather than use uname or other variables.
answered 8 hours ago
bmike♦bmike
164k46300643
Wouldsw_verswork in a shell script?
– Wowfunhappy
8 hours ago
It’s in the path of all the shipping shells on macOS / OS X / Darwin, so yes @Wowfunhappy it will work well.
– bmike♦
8 hours ago
Thanks. I remember why I didn't use this now—because it doesn't output an integer likeOSTYPE:6, I can't use a simple -ge / -le checks to isolate "this version and everything newer/older"
– Wowfunhappy
8 hours ago
@Wowfunhappy Aren’t the build numbers monotonically increasing and sortable as strings? I think there’s an entire python library / module to handle this iirc - it’s pyfacts - github.com/timsutton/python-macadmin-tools
– bmike♦
8 hours ago
Ah, Finlay Doobie, who fixed a bug in OS X that escaped Apple's software engineers for over a year - wired.com/2002/03/apple-ousts-coder-for-being-young
– fd0
7 hours ago
add a comment |
Apple stores version information in Core Foundation and here is the source code showing how they build to each version.
- https://opensource.apple.com/source/DarwinTools/DarwinTools-1/sw_vers.c.auto.html
I’d use sw_vers to get your version information if you’re scripting rather than use uname or other variables.
answered 8 hours ago
bmike♦bmike
164k46300643
Wouldsw_verswork in a shell script?
– Wowfunhappy
8 hours ago
It’s in the path of all the shipping shells on macOS / OS X / Darwin, so yes @Wowfunhappy it will work well.
– bmike♦
8 hours ago
Thanks. I remember why I didn't use this now—because it doesn't output an integer likeOSTYPE:6, I can't use a simple -ge / -le checks to isolate "this version and everything newer/older"
– Wowfunhappy
8 hours ago
@Wowfunhappy Aren’t the build numbers monotonically increasing and sortable as strings? I think there’s an entire python library / module to handle this iirc - it’s pyfacts - github.com/timsutton/python-macadmin-tools
– bmike♦
8 hours ago
Ah, Finlay Doobie, who fixed a bug in OS X that escaped Apple's software engineers for over a year - wired.com/2002/03/apple-ousts-coder-for-being-young
– fd0
7 hours ago
add a comment |
Apple stores version information in Core Foundation and here is the source code showing how they build to each version.
- https://opensource.apple.com/source/DarwinTools/DarwinTools-1/sw_vers.c.auto.html
I’d use sw_vers to get your version information if you’re scripting rather than use uname or other variables.
answered 8 hours ago
bmike♦bmike
164k46300643
Apple stores version information in Core Foundation and here is the source code showing how they build to each version.
- https://opensource.apple.com/source/DarwinTools/DarwinTools-1/sw_vers.c.auto.html
I’d use sw_vers to get your version information if you’re scripting rather than use uname or other variables.
answered 8 hours ago
bmike♦bmike
164k46300643
answered 8 hours ago
bmike♦bmike
164k46300643
answered 8 hours ago
bmike♦bmike
164k46300643
answered 8 hours ago
bmike♦bmike
164k46300643
164k46300643
Wouldsw_verswork in a shell script?
– Wowfunhappy
8 hours ago
It’s in the path of all the shipping shells on macOS / OS X / Darwin, so yes @Wowfunhappy it will work well.
– bmike♦
8 hours ago
Thanks. I remember why I didn't use this now—because it doesn't output an integer likeOSTYPE:6, I can't use a simple -ge / -le checks to isolate "this version and everything newer/older"
– Wowfunhappy
8 hours ago
@Wowfunhappy Aren’t the build numbers monotonically increasing and sortable as strings? I think there’s an entire python library / module to handle this iirc - it’s pyfacts - github.com/timsutton/python-macadmin-tools
– bmike♦
8 hours ago
Ah, Finlay Doobie, who fixed a bug in OS X that escaped Apple's software engineers for over a year - wired.com/2002/03/apple-ousts-coder-for-being-young
– fd0
7 hours ago
add a comment |
Wouldsw_verswork in a shell script?
– Wowfunhappy
8 hours ago
It’s in the path of all the shipping shells on macOS / OS X / Darwin, so yes @Wowfunhappy it will work well.
– bmike♦
8 hours ago
Thanks. I remember why I didn't use this now—because it doesn't output an integer likeOSTYPE:6, I can't use a simple -ge / -le checks to isolate "this version and everything newer/older"
– Wowfunhappy
8 hours ago
@Wowfunhappy Aren’t the build numbers monotonically increasing and sortable as strings? I think there’s an entire python library / module to handle this iirc - it’s pyfacts - github.com/timsutton/python-macadmin-tools
– bmike♦
8 hours ago
Ah, Finlay Doobie, who fixed a bug in OS X that escaped Apple's software engineers for over a year - wired.com/2002/03/apple-ousts-coder-for-being-young
– fd0
7 hours ago
Would
sw_vers work in a shell script?– Wowfunhappy
8 hours ago
Would
sw_vers work in a shell script?– Wowfunhappy
8 hours ago
It’s in the path of all the shipping shells on macOS / OS X / Darwin, so yes @Wowfunhappy it will work well.
– bmike♦
8 hours ago
It’s in the path of all the shipping shells on macOS / OS X / Darwin, so yes @Wowfunhappy it will work well.
– bmike♦
8 hours ago
Thanks. I remember why I didn't use this now—because it doesn't output an integer like
OSTYPE:6, I can't use a simple -ge / -le checks to isolate "this version and everything newer/older"– Wowfunhappy
8 hours ago
Thanks. I remember why I didn't use this now—because it doesn't output an integer like
OSTYPE:6, I can't use a simple -ge / -le checks to isolate "this version and everything newer/older"– Wowfunhappy
8 hours ago
@Wowfunhappy Aren’t the build numbers monotonically increasing and sortable as strings? I think there’s an entire python library / module to handle this iirc - it’s pyfacts - github.com/timsutton/python-macadmin-tools
– bmike♦
8 hours ago
@Wowfunhappy Aren’t the build numbers monotonically increasing and sortable as strings? I think there’s an entire python library / module to handle this iirc - it’s pyfacts - github.com/timsutton/python-macadmin-tools
– bmike♦
8 hours ago
Ah, Finlay Doobie, who fixed a bug in OS X that escaped Apple's software engineers for over a year - wired.com/2002/03/apple-ousts-coder-for-being-young
– fd0
7 hours ago
Ah, Finlay Doobie, who fixed a bug in OS X that escaped Apple's software engineers for over a year - wired.com/2002/03/apple-ousts-coder-for-being-young
– fd0
7 hours ago
add a comment |
I don't have a 10.0 machine to test on, but on a 10.3 machine, echo ${OSTYPE:6} returns a blank line; on 10.6, it returns 10.0.
(Incidentally, your shell script would need to explicitly invoke bash. The default shell on very old versions of OSX is tcsh, which doesn't understand the ${OSTYPE:6} syntax.)
answered 1 min ago
MarkMark
1397
add a comment |
I don't have a 10.0 machine to test on, but on a 10.3 machine, echo ${OSTYPE:6} returns a blank line; on 10.6, it returns 10.0.
(Incidentally, your shell script would need to explicitly invoke bash. The default shell on very old versions of OSX is tcsh, which doesn't understand the ${OSTYPE:6} syntax.)
answered 1 min ago
MarkMark
1397
add a comment |
I don't have a 10.0 machine to test on, but on a 10.3 machine, echo ${OSTYPE:6} returns a blank line; on 10.6, it returns 10.0.
(Incidentally, your shell script would need to explicitly invoke bash. The default shell on very old versions of OSX is tcsh, which doesn't understand the ${OSTYPE:6} syntax.)
answered 1 min ago
MarkMark
1397
I don't have a 10.0 machine to test on, but on a 10.3 machine, echo ${OSTYPE:6} returns a blank line; on 10.6, it returns 10.0.
(Incidentally, your shell script would need to explicitly invoke bash. The default shell on very old versions of OSX is tcsh, which doesn't understand the ${OSTYPE:6} syntax.)
answered 1 min ago
MarkMark
1397
answered 1 min ago
MarkMark
1397
answered 1 min ago
MarkMark
1397
answered 1 min ago
MarkMark
1397
1397
add a comment |
add a comment |
For some older versions, it returns a dotted number pair. On OS X 10.6.8 I get "10.0", and on OS X 10.3.9 I get "7.0". Unfortunately, that means
bashcan't do numeric comparisons on it in these versions.– Gordon Davisson
6 hours ago