Problèmes récurrents pour éteindre mon Mac 10.15.7

Bonjour, chaque fois que je veux éteindre mon ordi il se met en écran sombre mais se relance sans jamais s'éteindre, je suis obligé d'attendre qu'il se relance tout à fait pour lui dire à nouveau de s'éteindre et là ça marche.
Quand j'allume mon ordi le lendemain, j'ai un message d'erreur suivant :

panic(cpu 1 caller 0xffffff7f97494aae): watchdog timeout: no checkins from watchdogd in 310 seconds (965 totalcheckins since monitoring last enabled), shutdown in progress
Backtrace (CPU 1), Frame : Return Address
0xffffff812bafbc40 : 0xffffff801631868d
0xffffff812bafbc90 : 0xffffff8016452ab5
0xffffff812bafbcd0 : 0xffffff801644463e
0xffffff812bafbd20 : 0xffffff80162bea40
0xffffff812bafbd40 : 0xffffff8016317d57
0xffffff812bafbe40 : 0xffffff8016318147
0xffffff812bafbe90 : 0xffffff8016abf328
0xffffff812bafbf00 : 0xffffff7f97494aae
0xffffff812bafbf10 : 0xffffff7f97494486
0xffffff812bafbf50 : 0xffffff7f974a9d9c
0xffffff812bafbfa0 : 0xffffff80162be13e
Kernel Extensions in backtrace:
com.apple.driver.watchdog(1.0)[B6A95892-6C75-3CF5-A6CC-6D83F30FA1D5]@0xffffff7f97493000->0xffffff7f9749bfff
com.apple.driver.AppleSMC(3.1.9)[D2F0B610-83F8-3B84-B0BD-D9D0CC95A697]@0xffffff7f9749c000->0xffffff7f974bafff
dependency: com.apple.iokit.IOACPIFamily(1.4)[2956198D-24F2-3790-A9B2-1EAB9434B906]@0xffffff7f9748a000
dependency: com.apple.driver.watchdog(1)[B6A95892-6C75-3CF5-A6CC-6D83F30FA1D5]@0xffffff7f97493000
dependency: com.apple.iokit.IOPCIFamily(2.9)[2F37AE58-E6B9-3B18-9092-3B80D34C334B]@0xffffff7f96d31000

BSD process name corresponding to current thread: kernel_task

Mac OS version:
19H15

Kernel version:
Darwin Kernel Version 19.6.0: Thu Oct 29 22:56:45 PDT 2020; root:xnu-6153.141.2.2~1/RELEASE_X86_64
Kernel UUID: 9B5A7191-5B84-3990-8710-D9BD9273A8E5
Kernel slide: 0x0000000016000000
Kernel text base: 0xffffff8016200000
__HIB text base: 0xffffff8016100000
System model name: iMac18,2 (Mac-77F17D7DA9285301)
System shutdown begun: YES
Panic diags file available: YES (0x0)

System uptime in nanoseconds: 9981548786761
last loaded kext at 479700879681: >!AXsanScheme 3 (addr 0xffffff7f9b062000, size 32768)
last unloaded kext at 638597940531: >!AXsanScheme 3 (addr 0xffffff7f9b062000, size 32768)
loaded kexts:
com.paragon-software.filesystems.ntfs 100.5.15
@filesystems.smbfs 3.4.4
>!ATopCaseHIDEventDriver 3430.1
>AudioAUUC 1.70
@fileutil 20.036.15
>AGPM 111.4.4
>!APlatformEnabler 2.7.0d0
>X86PlatformShim 1.0.0
@filesystems.autofs 3.0
>!AHDA 283.15
>!AUpstreamUserClient 3.6.8
@kext.AMDRadeonServiceManager 3.1.0
@kext.AMDFramebuffer 3.1.0
@kext.AMDRadeonX4000 3.1.0
>!AGraphicsDevicePolicy 5.2.6
@AGDCPluginDisplayMetrics 5.2.6
>!AHV 1
|IOUserEthernet 1.0.1
>!A!IKBLGraphics 14.0.7
|IO!BSerialManager 7.0.6f7
>pmtelemetry 1
@Dont_Steal_Mac_OS_X 7.0.0
|Broadcom!B20703USBTransport 7.0.6f7
@kext.AMD9500!C 3.1.0
>!AMCCSControl 1.14
>!A!IPCHPMC 2.0.1
>!A!IKBLGraphicsFramebuffer 14.0.7
>eficheck 1
>!AThunderboltIP 3.1.4
>!A!ISlowAdaptiveClocking 4.0.0
>!AGFXHDA 100.1.429
>!ASMCLMU 212
>!AVirtIO 1.0
@filesystems.hfs.kext 522.100.5
@!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1
@BootCache 40
@!AFSCompression.!AFSCompressionTypeZlib 1.0.0
@filesystems.apfs 1412.141.1
|!ABCM5701Ethernet 10.3.5
>!ASDXC 1.7.7
>AirPort.BrcmNIC 1400.1.1
@private.KextAudit 1.0
>!AAHCIPort 341.140.1
>!AACPIButtons 6.1
>!ARTC 2.0
>!ASMBIOS 2.1
>!AACPIEC 6.1
>!AAPIC 1.7
$!AImage4 1
@nke.applicationfirewall 303
$TMSafetyNet 8
@!ASystemPolicy 2.0.0
|EndpointSecurity 1
>!AMultitouchDriver 3440.1
>!AInputDeviceSupport 3440.8
>!AHS!BDriver 3430.1
>IO!BHIDDriver 7.0.6f7
>!AHIDKeyboard 209
@kext.triggers 1.0
>DspFuncLib 283.15
@kext.OSvKernDSPLib 529
@kext.AMDRadeonX4200HWLibs 1.0
@kext.AMDRadeonX4000HWServices 3.1.0
>!AGraphicsControl 5.2.6
|IOAVB!F 850.1
@!AGPUWrangler 5.2.6
|Broadcom!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CUSBTransport 7.0.6f7
|IO!BHost!CTransport 7.0.6f7
|IO!B!F 7.0.6f7
|IO!BPacketLogger 7.0.6f7
>!ASMBus!C 1.0.18d1
>!ASMBusPCI 1.0.14d1
|IOAccelerator!F2 438.7.3
@kext.AMDSupport 3.1.0
@!AGraphicsDeviceControl 5.2.6
|IOSlowAdaptiveClocking!F 1.0.0
>X86PlatformPlugin 1.0.0
>IOPlatformPlugin!F 6.0.0d8
>!AHDA!C 283.15
|IOHDA!F 283.15
|IONDRVSupport 576.1
|IOGraphics!F 576.1
@plugin.IOgPTPPlugin 840.3
>usb.!UHub 1.2
>usb.networking 5.0.0
>usb.!UHostCompositeDevice 1.2
|IOAudio!F 300.2
@vecLib.kext 1.2.0
|IOSerial!F 11
|IOSurface 269.11
@filesystems.hfs.encodings.kext 1
>!AThunderboltDPInAdapter 6.2.6
>!AThunderboltDPAdapter!F 6.2.6
>!AThunderboltPCIDownAdapter 2.5.4
>!AHPM 3.4.4
>!A!ILpssI2C!C 3.0.60
>!A!ILpssDmac 3.0.60
>!A!ILpssI2C 3.0.60
|IOAHCIBlock!S 316.100.5
>!AThunderboltNHI 5.8.6
|IOThunderbolt!F 7.6.1
|IOEthernetAVB!C 1.1.0
|IO80211!F 1200.12.2b1
>mDNSOffloadUserClient 1.0.1b8
>corecapture 1.0.4
|IOSkywalk!F 1
|IOAHCI!F 290.0.1
|IOUSB!F 900.4.2
>usb.!UXHCIPCI 1.2
>usb.!UXHCI 1.2
>!AEFINVRAM 2.1
>!AEFIRuntime 2.1
|IOSMBus!F 1.1
|IOHID!F 2.0.0
$quarantine 4
$sandbox 300.0
@kext.!AMatch 1.0.0d1
>DiskImages 493.0.0
>!AFDEKeyStore 28.30
>!AEffaceable!S 1.0
>!ASSE 1.0
>!AKeyStore 2
>!UTDM 489.120.1
|IOSCSIBlockCommandsDevice 422.120.3
>!ACredentialManager 1.0
>KernelRelayHost 1
>!ASEPManager 1.0.1
>IOSlaveProcessor 1
|IOUSBMass!SDriver 157.140.1
|IOSCSIArchitectureModel!F 422.120.3
|IO!S!F 2.1
|IOUSBHost!F 1.2
>!UHostMergeProperties 1.2
>usb.!UCommon 1.0
>!ABusPower!C 1.0
|CoreAnalytics!F 1
>!AMobileFileIntegrity 1.0.5
@kext.CoreTrust 1
|IOTimeSync!F 840.3
|IONetworking!F 3.4
|IOReport!F 47
>!AACPIPlatform 6.1
>!ASMC 3.1.9
>watchdog 1
|IOPCI!F 2.9
|IOACPI!F 1.4
@kec.pthread 1
@kec.corecrypto 1.0
@kec.Libm 1


Merci pour votre aide