I think I have a Lemon iMac, issue persists for years

iMac Specs: MacOS Catalina 10.15.4

Mac (Retina 4K, 21.5-inch, 2017)

3 GHz Quad-Core Intel Core i5

8 GB 2400 MHz DDR4

Radeon Pro 555 2 GB

Since

I bought this iMac, it has had an issue with booting up. It would

require me to do a fresh install on macOS and than it would work fine

for a few months and would do it again ( rinse and repeat). But now it

just will not boot in its regular state, only safe mode. And if you were

lucky enough for it to boot, it will just randomly restart saying it

restarted because of a problem. I have done many troubleshooting steps

with no success including:

Diagnostics (everything's fine according to that).

EntreCheck: No major issues

Tried Recovery Mode to reinstall and first aid drives.

Reset

SMC and NVRAM multiple times utilizing s different methods including

singlue user "pmset -a restoredefaults" and "nvram -c" This will

sometimes allow a boot but not before long it will restart.

ANy

Help would be appreciated for a more permanent fix. I currently have a

freshly wiped and reinstalled macOS but I left it on to eat dinner and

it restarted "because of a problem" and now won't boot again.

The notification box that pops up upon a boot from a crash gives me this info which I cannot decipher:


iMac 21.5" 4K, macOS 10.15

Posted on May 13, 2020 4:25 PM

Reply
Question marked as Top-ranking reply

Posted on May 13, 2020 5:26 PM

All these entries are common to Macs with failed/failing video hardware:


Kernel Extensions in backtrace:

com.apple.iokit.IOGraphicsFamily(575.1)[D47CA481-C5E5-3F03-9B04-6634DF5F3121]@0xffffff7f8de54000->0xffffff7f8dea4fff

dependency: com.apple.iokit.IOPCIFamily(2.9)[1B1F3BBB-9212-3CF9-94F8-8FEF0D3ACEC4]@0xffffff7f8c501000

com.apple.iokit.IOAcceleratorFamily2(438.4.5)[33DA860E-90A6-3224-A944-93FA125B054E]@0xffffff7f8dece000->0xffffff7f8df91fff

dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[5EF51D44-9FC7-357F-9FB7-3468FD748382]@0xffffff7f8c388000

dependency: com.apple.iokit.IOPCIFamily(2.9)[1B1F3BBB-9212-3CF9-94F8-8FEF0D3ACEC4]@0xffffff7f8c501000

dependency: com.apple.iokit.IOSurface(269.11)[E71EAC82-A838-3430-B5D1-2CB347E6CF59]@0xffffff7f8d681000

dependency: com.apple.iokit.IOGraphicsFamily(575.1)[D47CA481-C5E5-3F03-9B04-6634DF5F3121]@0xffffff7f8de54000

dependency: com.apple.iokit.IOReportFamily(47)[337B24B2-0261-3521-8D1B-23387FC1D657]@0xffffff7f8c430000

com.apple.kext.AMDFramebuffer(3.0.8)[6E140F21-6547-3913-9A7F-C7FA19E607C1]@0xffffff7f900b9000->0xffffff7f900e2fff

dependency: com.apple.iokit.IOACPIFamily(1.4)[9D1FF279-C4A2-3344-902F-E0B22B508689]@0xffffff7f8c4ef000

dependency: com.apple.iokit.IOPCIFamily(2.9)[1B1F3BBB-9212-3CF9-94F8-8FEF0D3ACEC4]@0xffffff7f8c501000

dependency: com.apple.kext.AMDSupport(3.0.8)[6F5D9E4A-5DC8-3A3F-86E3-CF1AA832867F]@0xffffff7f8e1f2000

dependency: com.apple.iokit.IOGraphicsFamily(575.1)[D47CA481-C5E5-3F03-9B04-6634DF5F3121]@0xffffff7f8de54000 entries are common flags that show up when any Mac is having video hardware issues:


Unfortunately, iMacs made after 2011 do not have video cards. The video hardware is soldered to and integral with the logic board. If it is a failure of the video hardware, the fix will require a new logic board.


However, please post the Etrecheck report in its entirety. Those of us who have read thousands of such reports may see something less ominous and expensive at play.


Use the "Additional Text" tool to insert the report:


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9 replies
Question marked as Top-ranking reply

May 13, 2020 5:26 PM in response to BARIIIIIIIICODE

All these entries are common to Macs with failed/failing video hardware:


Kernel Extensions in backtrace:

com.apple.iokit.IOGraphicsFamily(575.1)[D47CA481-C5E5-3F03-9B04-6634DF5F3121]@0xffffff7f8de54000->0xffffff7f8dea4fff

dependency: com.apple.iokit.IOPCIFamily(2.9)[1B1F3BBB-9212-3CF9-94F8-8FEF0D3ACEC4]@0xffffff7f8c501000

com.apple.iokit.IOAcceleratorFamily2(438.4.5)[33DA860E-90A6-3224-A944-93FA125B054E]@0xffffff7f8dece000->0xffffff7f8df91fff

dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[5EF51D44-9FC7-357F-9FB7-3468FD748382]@0xffffff7f8c388000

dependency: com.apple.iokit.IOPCIFamily(2.9)[1B1F3BBB-9212-3CF9-94F8-8FEF0D3ACEC4]@0xffffff7f8c501000

dependency: com.apple.iokit.IOSurface(269.11)[E71EAC82-A838-3430-B5D1-2CB347E6CF59]@0xffffff7f8d681000

dependency: com.apple.iokit.IOGraphicsFamily(575.1)[D47CA481-C5E5-3F03-9B04-6634DF5F3121]@0xffffff7f8de54000

dependency: com.apple.iokit.IOReportFamily(47)[337B24B2-0261-3521-8D1B-23387FC1D657]@0xffffff7f8c430000

com.apple.kext.AMDFramebuffer(3.0.8)[6E140F21-6547-3913-9A7F-C7FA19E607C1]@0xffffff7f900b9000->0xffffff7f900e2fff

dependency: com.apple.iokit.IOACPIFamily(1.4)[9D1FF279-C4A2-3344-902F-E0B22B508689]@0xffffff7f8c4ef000

dependency: com.apple.iokit.IOPCIFamily(2.9)[1B1F3BBB-9212-3CF9-94F8-8FEF0D3ACEC4]@0xffffff7f8c501000

dependency: com.apple.kext.AMDSupport(3.0.8)[6F5D9E4A-5DC8-3A3F-86E3-CF1AA832867F]@0xffffff7f8e1f2000

dependency: com.apple.iokit.IOGraphicsFamily(575.1)[D47CA481-C5E5-3F03-9B04-6634DF5F3121]@0xffffff7f8de54000 entries are common flags that show up when any Mac is having video hardware issues:


Unfortunately, iMacs made after 2011 do not have video cards. The video hardware is soldered to and integral with the logic board. If it is a failure of the video hardware, the fix will require a new logic board.


However, please post the Etrecheck report in its entirety. Those of us who have read thousands of such reports may see something less ominous and expensive at play.


Use the "Additional Text" tool to insert the report:


May 13, 2020 5:05 PM in response to BARIIIIIIIICODE

Sure...


A... Its the most common iMac failing point.


B... Safe Boot only a major symptom of GPU problems, about 1/2 to 7/8th the way through booting the big Graphic drivers load.


C... Your Report... false"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/IOAcceleratorFamily_kexts/IOAcceleratorFamily-438.4.5/Kext2/IOAccelLegacyDisplayMachine

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I think I have a Lemon iMac, issue persists for years

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