iFixit Battery Performance Issues after updating to Tahoe OS?

Question 1

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MacBook Pro 16" 2019 crwdns2933315:02crwdne2933315:0

Rich W

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timinete ta 57 agoYan 25, 2026

commented timinete ta 57 agoYan 25, 2026 crwdns2933505:0crwdne2933505:0 Rich W

Question 2

1 crwdns2930801:0crwdne2930801:0

MBP M1 2021: Strange Issue with Media Playback: No Sound/Stuck Video/

MacBook Pro 16" 2021 crwdns2933313:01crwdne2933313:0

K MI

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masiku 3 agoYan 21, 2026

commented masiku 3 agoYan 21, 2026 crwdns2933505:0crwdne2933505:0 K MI

Question 3

2 crwdns2873741:0crwdne2873741:0

A2141 Diagnosing strange random crashes

MacBook Pro 16" 2019 crwdns2933315:02crwdne2933315:0

Allan Binderup

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masiku 6 agoYan 19, 2026

edited by author masiku 6 agoYan 19, 2026 crwdns2933505:0crwdne2933505:0 Allan Binderup

Question 4

3 crwdns2873741:0crwdne2873741:0

Replace the thermal grease/paste

crwdns2934195:0crwdne2934195:0 MacBook Pro 16" 2019 crwdns2933315:03crwdne2933315:0

Aivaras Krupauskas

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Yan 14, 2026

commented Yan 14, 2026 crwdns2933505:0crwdne2933505:0 Aivaras Krupauskas

Question 5

1 crwdns2930801:0crwdne2930801:0

MBP M1 16” 2021 A2485 screen?

crwdns2934195:0crwdne2934195:0 MacBook Pro 16" 2021 crwdns2933313:01crwdne2933313:0

LingeringWaft 23

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Yan 7, 2026

commented Yan 7, 2026 crwdns2933505:0crwdne2933505:0 LingeringWaft

Question 6

2 crwdns2873741:0crwdne2873741:0

M1 Max MacBook Pro 16" screen goes black randomly.

MacBook Pro 16" 2021 crwdns2933315:02crwdne2933315:0

efu 13

crwdns2931741:0crwdne2931741:0

Yan 6, 2026

commented Yan 6, 2026 crwdns2933505:0crwdne2933505:0 efu

Question 7

2 crwdns2873741:0crwdne2873741:0

After replacing the battery, my computer does not work.

MacBook Pro 16" 2019 crwdns2933315:02crwdne2933315:0

livfe 6.5crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

Yan 6, 2026

commented Yan 6, 2026 crwdns2933505:0crwdne2933505:0 livfe

Question 8

4 crwdns2873741:0crwdne2873741:0

Changing A2780 motherboard and touch id into A2485

MacBook Pro 16" 2021 crwdns2933315:04crwdne2933315:0

DanJ 497.9crwdns2936485:0crwdne2936485:0

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Sun 26, 2026

commented Sun 26, 2026 crwdns2933505:0crwdne2933505:0 DanJ

Question 9

1 crwdns2930801:0crwdne2930801:0

MacBook does not enter safe sleep after battery replacement.

crwdns2934195:0crwdne2934195:0 MacBook Pro 16" 2019 crwdns2933313:01crwdne2933313:0

jimmysofat6864 309

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Sun 14, 2026

edited by author Sun 14, 2026 crwdns2933505:0crwdne2933505:0 jimmysofat6864

Question 10

3 crwdns2873741:0crwdne2873741:0

How do I remove keycaps?

crwdns2934195:0crwdne2934195:0 MacBook Pro 16" 2021 crwdns2933315:03crwdne2933315:0

Maxim 69

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Sun 6, 2026

commented Sun 6, 2026 crwdns2933505:0crwdne2933505:0 Maxim

Question 11

2 crwdns2873741:0crwdne2873741:0

Screen broken - how do I replace it?

MacBook Pro 16" 2021 crwdns2933315:02crwdne2933315:0

livfe 6.5crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

N'w 10, 2025

commented N'w 10, 2025 crwdns2933505:0crwdne2933505:0 livfe

Question 12

1 crwdns2930801:0crwdne2930801:0

Trackpad Flex Retention Screw Standoffs Torn Off the Logic Board

MacBook Pro 16" 2019 crwdns2933313:01crwdne2933313:0

DanJ 497.9crwdns2936485:0crwdne2936485:0

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N'w 9, 2025

answered N'w 9, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 13

1 crwdns2930801:0crwdne2930801:0

Stuck in DFU mode

MacBook Pro 16" 2019 crwdns2933313:01crwdne2933313:0

DanJ 497.9crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

N'w 8, 2025

commented N'w 8, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 14

2 crwdns2873741:0crwdne2873741:0

Fans run at 100%, cpu under clocked, even though temps are low

crwdns2934195:0crwdne2934195:0 MacBook Pro 16" 2021 crwdns2933315:02crwdne2933315:0

DanJ 497.9crwdns2936485:0crwdne2936485:0

crwdns2942989:0crwdne2942989:0

N'w 2, 2025

answer accepted N'w 2, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 15

1 crwdns2930801:0crwdne2930801:0

One antenna coaxial cable won't snap on, another connector broke

MacBook Pro 16" 2021 crwdns2933313:01crwdne2933313:0

DanJ 497.9crwdns2936485:0crwdne2936485:0

crwdns2931737:0crwdne2931737:0

Huk 30, 2025

answer edited Huk 30, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 16

1 crwdns2930801:0crwdne2930801:0

Weird: Battery won’t charge

MacBook Pro 16" 2019 crwdns2933313:01crwdne2933313:0

DanJ 497.9crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

Huk 26, 2025

commented Huk 26, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 17

1 crwdns2930801:0crwdne2930801:0

Right fan spinning after water spill on MacBook

MacBook Pro 16" 2021 crwdns2933313:01crwdne2933313:0

DanJ 497.9crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

Huk 23, 2025

commented Huk 23, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 18

1 crwdns2930801:0crwdne2930801:0

LCD is finished, what are the options if any?

crwdns2934195:0crwdne2934195:0 MacBook Pro 16" 2019 crwdns2933313:01crwdne2933313:0

livfe 6.5crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

Huk 22, 2025

commented Huk 22, 2025 crwdns2933505:0crwdne2933505:0 livfe

Question 19

1 crwdns2930801:0crwdne2930801:0

MacBook Pro 16" (2021 A2485) Upper Case Assembly and Battery Replacement Guide?

MacBook Pro 16" 2021 crwdns2933313:01crwdne2933313:0

DanJ 497.9crwdns2936485:0crwdne2936485:0

crwdns2931737:0crwdne2931737:0

Huk 17, 2025

answer edited Huk 17, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 20

1 crwdns2930801:0crwdne2930801:0

Where are the microphones located?

MacBook Pro 16" 2019 crwdns2933313:01crwdne2933313:0

oldturkey03 844.1crwdns2936485:0crwdne2936485:0

crwdns2931217:0crwdne2931217:0

Huk 17, 2025

answered Huk 17, 2025 crwdns2933505:0crwdne2933505:0 oldturkey03

crwdns2944620:0MacBook Pro 16"crwdne2944620:0

MacBook Pro 16" crwdns2934277:0crwdne2934277:0