Headcase Mac OS
G2000 Gaming Headset for PS5, PS4, PC, Xbox One, Surround Sound Over Ear Headphones with Mic, LED Light for Mac Laptop Switch Playstation Xbox Series X/S Sep 25. Mac OS X & macOS names. As you can see from the list above, with the exception of the first OS X beta, all versions of the Mac operating system from 2001 to 2012 were all named after big cats. Get the best deals on Headcase Designs Cell Phone Cases, Covers & Skins for Apple when you shop the largest online selection at eBay.com. Free shipping on many items Browse your favorite brands affordable prices. Setting up USB Headset on a MacThis is prep for PIA: Flipping the Classroom 2015.
Your Mac provides several tools to help you identify it. The simplest is About This Mac, available by choosing About This Mac from the Apple menu in the top left-hand corner of your screen. The other is the System Information app. Find out how to use these tools to identify your Mac.
Each header is custom fit to the specific engine and includes applicable screws or strap.
Flexible connector and tie straps are not included.
9-2-2020
.10 size are 7/32' less ----- .20 size are 1/16' less .90-3.2 are 1/16' more ----- 3.0-up are 1/8' more | |
inch to mm Std. 1 5/8'= 41.27mm --- Long 2 3/8'= 60.325mm --- ex-long 3 1/8`'= 79.375mm | |
Threads are in Engine |
Marine Headers are the same as standard Headers,
but angling up out of a boat at 15° / 'degrees' or use on a
high wing airplane to angle down under the wing at 15° / 'degrees'
| Engine(s) Fitted | Stock # | |||
|---|---|---|---|---|
| standard | long | ex-long | 15° marine | |
| .10-.15 Engines ( 9/16'od Alum. tubing uses - 1/2'id Silicone tubing) PLEASE Note! MACS headers are not designed to support the tuned pipe or in-line muffler that they connect to the motor they are attached to. | ||||
| O.S. .10-.18 CV,FP,LA&FSR K&B .18 (bolt through) Magnum XLS.15 MDS .18 FS Pro Thunder Tiger GP .10-.15 (screws 4/40 x 1 1/4' fillister head) (center to center = 27.43mm/1.080') Super Tiger.18 Inboard Engine (the mounting of this motor hasn't been verified - any help would be appreciated) | 2041 | 2042 | 2043 | |
Super Tiger X.11 (bolt through) | 2060 | 2061 | ||
| Custom .15 -.18 Marine ( screws -4/40 x 1 1/2' fillister head ) ( center to center = 27.43mm/1.080' ) for O.S. .18 CV RMX and other equivalent motors Wrap-to-center 25°up / 17° down header pipe (5/8'od tube) (this header puts the pipes right behind the motor, the carb. may need to be adjusted to allow this header to fit) | 2074 | |||
| Engine(s) Fitted | Stock # | |||
|---|---|---|---|---|
| standard | long | ex-long | 15° marine | |
| .20-.36 Engines ( 5/8'od Alum. tubing / uses - 1/2'id Silicone tubing) (+PLEASE Note! MACS headers are not designed to support the tuned pipe or in-line muffler that they connect to the motor they are attached to.) | ||||
| ENYA X .19-.25 (bolt-on) (screws 3mm x 12mm socket head) (center to center = 24mm/.945') | 2210 | 2211 | 2212 | |
| HB .20 .21 .25 Veco .19 Webra .28 Strap On | 2230 | 2231 | 2232 | 2233 |
| HP .20 (bolt-on) (screws 3mm x 12mm socket head) (center to center = 28mm/1.102') | 2250 | |||
| MVVS .20 (bolt-on) (screws 2.5mm x 12mm socket head) (center to center = 25mm/.984') | 2260 | 2261 | 2263 | |
| Irvine .20 (bolt-on) (screws 4/40 x 1/2' socket head) (center to center = 25.40mm/1.000') | 2270 | 2272 | 2273 | |
| O.S. .20-.25 FP & LA Magnum .21-.28 GP Thunder Tiger GP .25 Super Tiger G .34 (bolt through) (screws 5/40 x 1 1/4' socket head) (center to center = 32mm/1.260') | 2300 | 2301 | 2302 | 2303 |
| O.P.S. 3.5 (.21) Norvel .25 BB (bolt-on) (screws 5/40 x 1/2' socket head) (center to center = 7mm/1.063') | 2310 | 2311 | 2312 | 2313 |
| O.S. .21-.36 FS-SF-FX-SX-AX (for OS.20-.25 FP or LA see #2300) Enya .21CX, SS30, 35X-TN & 35XS Evolution .36 NT GMS 2000 ABC .25-.36 Jett .25-.35 Kyosho .32-.36 GT Magnum XLS.25 & .25-.28 Pro MDS .28-38 FS Pro NovaRossi Rex R.28 CR Thunder Tiger Pro .25-.36 Webra .25-.36 Speed (bolt through) (screws 5/40 x 1 1/4' socket head) (center to center = 35mm/1.380') | ||||
| Super Tiger S .21-.34K (bolt-on) (screws 3mm x 12mm socket head) (center to center = 32mm/1.260') | 2360 | 2361 | 2362 | |
| Super Tiger X.15-.25 (bolt through) (screws 2/56 x 1 1/4') (center to center = 30mm/1.181') | 2370 | 2372 | 2373 | |
| Super Tiger S.21-.29 (bolt through) (screws 4/40 x 1 1/4' ) (center to center = 32mm/1.260') | 2380 | 2381 | 2382 | |
| ENYA .29 -.45 TV (strap-on) | 2392 | |||
| Engine(s) Fitted | Stock # | |||
|---|---|---|---|---|
| standard | long | ex-long | 15° marine | |
| .35-.55 Engines ( 3/4'od Alum. tubing / uses - 5/8'id Silicone tubing) (+PLEASE Note! MACS headers are not designed to support the tuned pipe or in-line muffler that they connect to the motor they are attached to.) | ||||
| Enya .40-.45 X & CX (bolt-on) O.P.S. .40 (screws 3.5mm x 12mm socket head) (center to center = 30mm/1.181') | 2420 | 2421 | 2422 | |
| Enya .40 SS(bolt through) (screws 5/40 x 1 1/4' socket head) (center to center = 42.16mm/1.660') (can be used on a .40-.45 CX) (that has the bolt-through.95 holes) | ||||
| Enya 40XZ-TN & 40XZS (see-#2650) | - | - | - | - |
Fox .40-.45 Schnuerle (bolt on) | 2450 | 2451 | 2452 | 2453 |
| MDS .40 FS (bolt on) (screws 4mm x 12mm socket head) (center to center = 31mm/1.220') | 2481 | 2482 | ||
| Jett .40-.50 (not the 40L) H.B. .40 (bolt through) (screws 5/40 x 1 1/4' socket head) (center to center = 38.10mm/1.500') | ||||
| MDS .46 FS (bolt through) (screws 5/40 x 1 1/2' socket head) (center to center = 42.5mm/1.673') | 2510 | 2512 | ||
| K&B.40 (bolt through) (screws 5/40 x 1 1/4' socket head) (center to center = 31.75mm/1.250') | 2530 | 2532 | 2533 | |
| K&B.45 Sportster &.48(bolt through) (screws 6/32 x 1 1/2' socket head) (center to center = 35.15mm/1.384') | 2540 | |||
| MVVS .40 (bolt-on) (screws 3mm x 12mm socket head) (center to center = 28.60mm/1.126') | 2550 | 2551 | 2552 | 2553 |
| Norvel AX .40 (see-#2800) | - | - | - | - |
| O.S. .40-.45 FSR (bolt-on) ASP .40 Fox .45, & .50 BBRC Irvine .40 (bolt on) (screws 3.5mm x 12mm socket head) (center to center = 27.94mm/1.100') HP .40 (bolt-on) (screws 3mm x 12mm socket head) | ||||
| O.S..40-.46 FX,SF (bolt through) O.S..46-.55 AX, .50 SX ASP.46 Evolution.40-.46 NT&.46NX,.52NX, .60NX & TrainerA & 10cc GX (gas) MACS Product Requires this header be segmented and the pipe be double mounted when used on the Evo.10cc GX (gas) motor or any gas motors. GMS 2000 ABS .40 & .47 Magnum XLS .46-.52 MDS .40-.48 FS Pro Mecoa .40-.46 NovaRossi Rex R.46/.57 CR Rossi .45-.53 (new-bolt through) Royal .46 Tower .46 (bolt through) Thunder Tiger Pro .40-.46 Y.S. .56 SR (bolt through) (screws 5/40 x 1 1/2' socket head) (center to center = 37.08mm/1.460') | ||||
| Rossi .40,.45&.53 (bolt-on) Powerhouse .40-.45 (Won't fit the new Bolt-Through motors) (screws 3.5mm x 12mm socket head) (center to center = 31.75mm/1.250') | 2603 | |||
| Picco .40 (bolt-on) (screws 3mm x 12mm socket head) (center to center = 27.69mm/1.090') | 2610 | 2611 | 2612 | 2613 |
| Super Tiger GS .40-.45-.51 Como .40-.51 (bolt through) (screws 6/32 x 1 1/2' fillister head) (center to center = 38.61mm/1.520') | 2620 | 2621 | 2622 | 2623 |
| Super Tiger S .40-.45 (K) Como .40-.45 (bolt-on) (screws 3.5mm x 12mm socket head) (center to center = 38.61mm/1.520') | 2630 | 2631 | 2632 | |
| Webra.40-.55 Speed(bolt through) (screws 4/40 x 1 1/2' fillister head) (center to center = 39.12mm/1.540') | ||||
| O.S. .40-.46 FP & LA (bolt through) Enya 40XZ-TN & 40XZS Evolution .40NX Jett .40L Magnum .40-.44GP ThunderTiger GP .42 & .46 Webra .40 RC (non-Speed) (screws 4/40 x 1 1/4' fillister head) (center to center = 35.05mm/1.380') | 2650 | 2651 | 2652 | |
| Webra .40-.50 Speed (old strap) (This motors has no exhaust mounting system - the header press-fits over the exhaust and straps in place) | 2660 | 2661 | ||
| YS .45 SF (bolt-on) (screws 3.5mm x 12mm socket head) (center to center = 31.19mm/1.228') (The new YS.56 SR is a bolt-through) (motor - use a #2590-2593 ) | ||||
| Engine(s) Fitted | Stock # | |||
|---|---|---|---|---|
| standard | long | ex-long | 15° marine | |
| .50-.75 Engines ( 3/4'od Alum. tubing / uses - 5/8'id Silicone tubing) (+PLEASE Note! MACS headers are not designed to support the tuned pipe or in-line muffler that they connect to the motor they are attached to.) | ||||
| Enya.45-.50SS & .50CX &.61CX TN & CXS PRO (bolt through) (screws 5/40 x 1 1/2' socket head) (center to center = 42.16mm/1.660') | 2710 | 2711 | 2712 | 2713 |
| H.P. .61 Webra .61 Speed (old strap-on) (countersink 1.658'lx.433'hx.062'd) | 2732 | 2733 | ||
| Fox .60 Eagle III (bolt-on) Irvine .61 (screws 6/32 x 1/2' socket head) (center to center = 34.80mm/1.370') | 2751 | 2752 | 2753 | |
| K & B .61 , H.B. .61 Jett .60 L(not the .65, .67L or .76L) Webra .61 BH (bolt through) (screws 5/40 x 1 1/2' socket head-n/w) (center to center = 38.10mm/1.500') | 2770 | 2771 | 2772 | up and over |
| K & B .65 Sportster (bolt through) (screws 6/32 x 1 1/2' socket head) (center to center = 38.10mm/1.500') | 2781 | 2782 | ||
Kraft .61 (bolt-on) 2804 down under | 2803 | |||
Moki .60 (bolt-on) | 2810 | 2811 | 2812 | |
| MDS .58 FS Pro (bolt through) (screws 5/40 x 1 1/4' socket head) (center to center = 42.06mm/1.656') | 2821 | 2822 | ||
| MDS .61 -- call first | 2830 | 2831 | ||
O.S. .50 FSR & .61 FSR (bolt-on) 2856 down under | 2853 | |||
| O.S. .61 FX & SF, .65 & .75 AX O.S. .60 FP & LA, .65 LA (bolt through) Evolution .61NT & .61NX (will not fit the .60NX or 10cc (gas) see #2590) GMS 2000 ABC .61 (not the .76 or the .61 ringed, the new ringed .61 is a bolt-on not a bolt-through see #2890 - #2893) Jett .67L & .76L (not the .60L or .65) Magnum XLS.61 & .61 Pro MDS .68-.78 FS Pro NovaRossi Rex R.60 CR Rossi .60-.65 (new) ThunderTiger GP & Pro .61 Webra .61-.75 P5-H (bolt through) (screws 8/32 x 1 3/4' fillister head) (center to center = 42.06mm/1.656') | 2860 | 2863 | ||
| Rossi .61 & .61 Powerhouse .60 (bolt-on) (screws 4mm x 12mm socket head) (center to center = 36.12mm/1.422') (Won't fit the newer Bolt-Through motors) (Some of the older 3.5mm screw versions are still available.) Call | 2870 | 2871 | 2872 | 2873 |
| Picco .60 (bolt-on) (screws 3mm x 12mm socket head) (center to center = 27.69mm/1.090') | 2880 | 2881 | 2882 | 2883 |
| Tower .61 & .75 (bolt-on) GMS 2000 .61 ringed GMS 2000 .76A (screws 4mm x 12mm socket head) (center to center = 40.13mm/1.580') | 2890 | 2891 | 2892 | 2893 |
| Super Tiger G .60, S .61-.75 Jett .65 (not the .60L, .67L or .76L) Como .61-.75 (bolt through) (screws 6/32 x 1 1/4' fillister head-n/w) (center to center = 47.12mm/1.855') | 2900 | 2901 | 2902 | 2903 |
| ??? | 2910 | 2911 | 2912 | |
Super Tiger S .61 K, .75 K (bolt-on)
| 2920 | 2921 | 2922 | 2923 |
| Y.S. .60 (non long-stroke) (bolt-on) (screws 4mm x 12mm socket head) (center to center = 32.21mm/1.268') | 2930 | 2931 | 2932 | 2933 |
for tuned pipes for airplanes see Aero-Tuned Pipes
for tuned pipes for boats & helicopters see Marine & Helo-Tuned Pipes
Also see Special Application Headers
| Engine(s) Fitted | Stock # | ||||
|---|---|---|---|---|---|
| standard | long | ex-long | 15° marine | ||
| .90-1.20 Engines ( 7/8'od Alum. tubing / uses - 3/4'id Silicone tubing) (+PLEASE Note! MACS headers are not designed to support the tuned pipe or in-line muffler that they connect to the motor they are attached to.) | |||||
| O.S. .90-1.08 FSR (old three bolt) (screws upper two 4mm x 12mm socket) (head-center to center=33.91mm/1.335') (lower one 3.5mm x 12mm socket head) | 2940 | 2941 | 2942 | 2943 | |
| ?? | 2951 | 2952 | |||
| MVVS .91 - 1.08 ASP .90-1.08 Magnum .90-1.08 (bolt-on) (screws 4mm x 16mm socket head) (center to center = 33.91mm/1.335') | 2960 | 2961 | 2962 | n/a | |
| Rossi .91 (bolt-on) (screws 3.5mm x 12mm socket head) (center to center = 40.13mm/1.580') (Won't fit the newer Bolt-Through motors) | 2965 | 2966 | 2967 | n/a | |
| Super Tiger G 90 Jett .90-1.20 (bolt through) (screws 6/32 x 1 1/4' fillister head) (center to center = 47.12mm/1.855') | 2970 | 2971 | 2972 | 2973 | |
| Super Tiger K 91 (bolt-on) (screws 3.5mm x 12mm socket head) (center to center = 47.14mm/1.856') | 2975 | 2976 | 2977 | n/a | |
| O.S. 91 FX, SX& SZ .95 AX, GT 15 ASP .91 (bolt through) Evolution.91 NX, 15cc GX(gas) MACS Product Requires this header be segmented and the pipe be double mounted when used on the Evo.15cc GX (gas), GT 15 motors or any gas motor. Magnum .91 Pro NovaRossi Rex R.91 CR, ICARUS 91 S Webra .91 P5 & i (bolt through) (screws 8/32 x 1 3/4' fillister head) (center to center = 42.06mm/1.656') | 2980 | 2981 | 2982 | 2983 | |
| Y.S. .90 &.91 SR, .91 ST (bolt-on) (screws 4mm x 16mm socket head) (center to center = 32.21mm/1.268') | 2985 | 2986 | 2987 | n/a | |
| O.S. 120 AX (bolt through) (screws 8/32 x 1 3/4' fillister head) (center to center = 48.01mm/1.890') | 2990 | 2991 | 2992 | 2993 | |
| 1.2-1.5 Engines ( 7/8'od Alum. tubing / uses - 3/4'id Silicone tubing) (+PLEASE Note! MACS headers are not designed to support the tuned pipe or in-line muffler that they connect to the motor they are attached to.) | |||||
| Irvine 120-150 (screws 4mm x 16mm socket head) (center to center = 44.70mm/1.760') | 4050 | 4051 | 4052 | n/a | |
| ASP 120 Evolution 100 NT & 1.20 NX Magnum XL 120 (screws 4mm x 16mm socket head) (center to center = 43.37mm/1.668') | 4070 | 4071 | 4072 | 4073 | |
Super Tiger G 2300 (bolt through) 4094 Wrap to Center, S.T.G. 2300 | 4090 | 4091 | 4092 | 4093 | |
| Thunder Tiger 120 Pro (bolt through) (screws 8/32 x 2' fillister head) (center to center = 48.77mm/1.920') | 4100 | 4101 | 4102 | n/a | |
| Webra 120 / Bully 1.2 PR GMS 2000 120 / Mark 135 MDS 148 / MVVS 215 UAV 120 (screws 4mm x 12mm socket head) (center to center = 40.39mm/1.590') | 4130 | 4131 | 4132 | n/a | |
| Zenoah G-20,G-23,G-26 (screws 5mm x 16mm socket head) (center to center = 34.29mm/1.350') | 4150 | 4151 | 4152 | 4153 | |
| Homelite 25cc (screws 10/24 x 5/8' socket head) (center to center = 38.35mm/1.510') | 4180 | 4181 | 4182 | 4183 | |
| 1.5-3.2 Engines ( 7/8'od Alum. tubing / uses - 3/4'id Silicone tubing) (+PLEASE Note! MACS headers are not designed to support the tuned pipe or in-line muffler that they connect to the motor they are attached to.) | |||||
| D.L.E. 20 (in design-sub#2985-2987) OS 22 GT (The #2985-2987 will fit and work, But the exhaust port is larger) (screws 4mm x 12mm socket head) (center to center = 32.21mm/1.268') | 4200 | 4201 | 4202 | n/a | |
| D.L.E. 30 O.S. 33 GT (screws 5mm x 16mm socket head) (center to center = 33.98mm/1.338') | 4210 | 4211 | 4212 | n/a | |
| Evolution 26cc MVVS 1.6 (screws 4mm x 12mm socket head) (center to center = 35.94mm/1.415') | 4220 | 4221 | 4222 | n/a | |
| Moki 1.5-1.8-2.1 Mark 1.5-1.8-2.1 (screws 4mm x 12mm socket head) (center to center = 34.08mm/1.342') | 4230 | 4231 | 4232 | n/a | |
Sachs Dolmar 2.0 4276 MAC Flex Tube Straight Adpter, Giant Scale 7/8 | 4270 | 4271 | 4272 | n/a | |
| Sachs Dolmar 2.6-3.2 ci Brison 3.2 (screws 5mm x 16mm socket head) (center to center = 35.31mm/1.390') | 4280 | 4281 | 4282 | n/a | |
| Super Tiger S 2000,2500,3000,3250 (screws 4mm x 12mm socket head) (center to center = 44.25mm/1.742') | 4300 | 4301 | 4302 | n/a | |
| O.S. 3500, 160 Super Tiger S 4500 (screws 5mm x 16mm socket head) (center to center = 44.00mm/1.732') | 4310 | 4311 | 4312 | n/a | |
| Super Twin ??? | 4340 | 4342 | |||
| 3W 35cc & 70-80cc Twin (3W41i, 3W50i, 3W85i, 3W100i, 3W40, (screws 5mm x 16mm socket head) (center to center = 36.32mm/1.430') 3W 70B2-These are unverified ) | 4360 | 4361 | 4362 | n/a | |
| ZDZ 40 (2.4) (screws 5mm x 16mm socket head) (center to center = 37.18mm/1.464') | 4380 | 4381 | 4382 | n/a | |
| Zenoah 445 Twin, GT-80 & G74 (screws 5mm x 16mm socket head) (center to center = 38.35mm/1.510') | 4400 | 4401 | 4402 | n/a | |
| Zenoah G-45 (screws 10x32 socket head+square nut) (center to center = 42.42mm/1.670') | 4420 | 4421 | 4422 | n/a | |
| 3.0-4.8 Engines ( 1'o.d. Alum. tubing ) (*flex connector not included - see our NEW 'Ultra-Pure Silicone Tubing') (+PLEASE Note! MACS headers are not designed to support the tuned pipe or in-line muffler that they connect to the motor they are attached to.) | |||||
| Quadra 52cc (screws 5mm x 16mm socket head) (center to center = 38.35mm/1.510') | 4460 | 4461 | 4462 | N/A | |
| Sachs Dolmar 3.7 - 4.2 Brison 4.2 - Fox 150 (screws 6mm x 16mm socket head) (center to center = 37.90mm/1.492') | 4480 | 4481 | 4482 | N/A | |
| 3W 35cc & 70-80cc Twin (screws 5mm x 16mm socket head) (center to center = 36.32mm/1.430') (3W41i, 3W50i, 3W85i, 3W100i, 3W40, 3W 70B2-These are unverified ) | 4510 | 4511 | 4512 | n/a | |
| DL 50, DLE 50 O.S. 55 GT 3W 60cc & 120cc Twin B.D. 5.1 Twin, ZDZ 50 (screws 5mm x 16mm socket head) (center to center = 40.00mm/1.574') | 4520 | 4521 | 4522 | N/A | |
| Webra 4.4 Bulli Celti Husky 4.2 A/3 (A*A*A) 4.4 - 8.8 JPX 8.4 - 8.8 (screws 6mm x 16mm socket head) (center to center = 40.28mm/1.586') (for the Mahle case) | 4540 | 4541 | 4542 | N/A | |
| Zenoah Q G-62 (screws 10x32 socket head+square nut) (center to center = 42.42mm/1.670') | 4560 | 4561 | 4562 | N/A | |
| 4.5-up Engines ( 1' to 1 1/4'o.d. Alum. tubing )(We only use Aluminum tubing NO STEEL - we prefer our header to break, NOT YOUR MOTOR) (*flex connector not included) (+PLEASE Note! MACS headers are not designed to support the tuned pipe or in-line muffler that they connect to the motor they are attached to.) | |||||
| DA 85s & 170twn (1' od tubing) (screws 5mm x 16mm socket head) (center to center = 41.88mm/1.648') | 4590 | 4591 | 4592 | N/A | |
| DA 85s & 170twn (1 1/8' od tubing) (screws 5mm x 16mm socket head) (center to center = 41.88mm/1.648') | 4595 | 4596 | 4597 | N/A | |
| Husky 6.0 Celty Husky 5.8 (screws 6mm x 16mm socket head) (center to center = 46.23mm/1.820') | 4620 | 4621 | 4622 | N/A | |
| Quadra 200 Twin | 4640 | 4641 | |||
| Sachs Dolmar 5.8 (1' od tubing) Fox 200 (screws 6mm x 16mm socket head) (cntr-cntr=40.28x5.64mm/1.586x.222') | 4660 | 4661 | 4662 | call-! | |
| Sachs Dolmar 5.8 (1 1/8' od tubing) Fox 200 (screws 6mm x 16mm socket head) (cntr-cntr=40.28x5.64mm/1.586x.222') | 4665 | 4666 | 4667 | call-! | |
| BME 58/116 Xtreme (1' od tubing) BME 50 Classic (screws 5mm x 16mm socket head) (cntr-cntr=24.73x19.10mm/.974x.752') | 4670 | 4671 | 4672 | N/A | |
| BME 58/116 Xtreme (1 1/8' od tubing) BME 50 Classic (screws 5mm x 16mm socket head) (cntr-cntr=24.73x19.10mm/.974x.752') | 4675 | 4676 | 4677 | N/A | |
or In-Line muffler that are connected to them.
They (the Tuned Pipe or In-Line Muffler) must be self- supported.
MACS Products will not replace or repair headers used in this manner.
! - This header is available in an Extra-Extra-Long - for info. contact us.
for tuned pipes for airplanes see Aero-Tuned Pipes
for tuned pipes for boats & helicopters see Marine Tuned Pipes
If, like me, you tried installing imagemagick or other software using Homebrew, you might have ran into this error:
This took me one day to fix, because usually everyone tells you to run xcode-select --install. This does not fix the problem.
Why this happens
Mac OS X 10.14 has stopped placing the include libraries in their usual location, /usr/include, keeping them only inside the XCode directory.
To confirm that this is the problem, simply run ls /usr/include. If the result comes out empty, its really this problem.
By running find / grep libxml/parser.h I can find the libxml library in several places:
What you should not do
Some would say that you should just link the path where the libraries are to /usr/include. This is not right, as it overrides the default behaviour expected by Mac OS and requires you to disable SIP (System Integrity Protection). Sometimes it is needed, but this is not one of those times. Leave csrutil alone.
You CANNOT modify /usr/include, even with the root user. It is locked by SIP, so if you try you will get a Operation not permitted error.
Mac Os Versions
What worked for me
Apple ships a “legacy installer” for you to be able to install the headers in the “old location”. Run this:
Then, the installer will be placed at your Destop. Simple double-click and it will install the headers in /usr/include.
Mac Os Mojave
or, if you want a pure command line alternative:
Problem fixed
Headcase Mac Os Update
The /usr/include directory now includes all the libraries required by brew to link during package compilation:
Headcase Mac Os Catalina
Now imagemagick and other kegs will install successfully.