Latest user agents (if you are looking for complete list, download it here):

• Mozilla/5.0 (Macintosh; PPC Mac OS X 10 9_2; rv:1.9.5.20) Gecko/ Firefox/3.6.2
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10 12_8; rv:1.9.3.20) Gecko/ Firefox/3.6.9
• Mozilla/5.0 (Macintosh; PPC Mac OS X 10 8_0; rv:1.9.2.20) Gecko/ Firefox/3.6.3
• Mozilla/5.0 (Macintosh; PPC Mac OS X 10 7_1; rv:1.9.6.20) Gecko/ Firefox/3.6.7
• Mozilla/5.0 (PPC64; rv:125.0) Gecko/20151014 Firefox/125.0
• Mozilla/5.0 (PPC; rv:125.0) Gecko/20151014 Firefox/125.0
• Mozilla/5.0 (Macintosh; PPC Mac OS X 10 6_5; rv:1.9.6.20) Gecko/ Firefox/3.6.14
• iTunes/4.7.1 (Linux; N; Synology DiskStation (DSM Package Management); PPC_QORIQ; DE; utf8) SqueezeCenter, Squeezebox Server, Logitech Media Server/7.7.2/33893
• Mozilla/5.0 (Wayland; Windows;PPC64;rv:-1) Gecko/20100101 Firefox/-1
• iCab/2.9.7 (Macintosh; U; PPC)
• iTunes/7.5 (Macintosh; N; PPC)
• iTunes/3.0 (Macintosh; N; PPC)
• iTunes/9.0 (Macintosh; N; PPC)
• Mozilla/5.0 (PPC; rv:8.0) Gecko/2014824 Firefox/8.0
• Mozilla/5.0 (PPC; rv:1.0) Gecko/2000516 Firefox/1.0
• Mozilla/5.0 (PPC; rv:4.0) Gecko/2000912 Firefox/4.0
• Mozilla/5.0 (PPC; rv:4.0) Gecko/2000727 Firefox/4.0
• Mozilla/5.0 (PPC; rv:13.0) Gecko/2020610 Firefox/13.0
• Mozilla/5.0 (PPC; rv:5.0) Gecko/2012512 Firefox/5.0
• Mozilla/5.0 (PPC; rv:3.0) Gecko/201383 Firefox/3.0
• Mozilla/5.0 (PPC; rv:5.0) Gecko/201111 Firefox/5.0
• iTunes/4.7.1 (Macintosh; N; PPC)
• Mozilla/5.0 (PPC; rv:7.0) Gecko/2016619 Firefox/7.0
• Mozilla/5.0 (PPC; rv:9.0) Gecko/201099 Firefox/9.0
• Mozilla/5.0 (PPC; rv:15.0) Gecko/2011730 Firefox/15.0
• Mozilla/5.0 (PPC; rv:6.0) Gecko/2004822 Firefox/6.0
• Mozilla/5.0 (PPC; rv:11.0) Gecko/200964 Firefox/11.0
• Mozilla/5.0 (PPC; rv:13.0) Gecko/201139 Firefox/13.0
• Mozilla/5.0 (PPC; rv:6.0) Gecko/2016826 Firefox/6.0
• Mozilla/5.0 (PPC; rv:6.0) Gecko/2005115 Firefox/6.0
• Mozilla/5.0 (PPC; rv:3.0) Gecko/2008914 Firefox/3.0
• Mozilla/5.0 (PPC; rv:2.0) Gecko/2007106 Firefox/2.0
• Mozilla/5.0 (PPC; rv:4.0) Gecko/200956 Firefox/4.0
• Mozilla/5.0 (PPC; rv:2.0) Gecko/20001211 Firefox/2.0
• Mozilla/5.0 (PPC; rv:13.0) Gecko/201388 Firefox/13.0
• Mozilla/5.0 (PPC; rv:10.0) Gecko/20171113 Firefox/10.0
• Mozilla/5.0 (PPC; rv:11.0) Gecko/2010129 Firefox/11.0
• Mozilla/5.0 (PPC; rv:7.0) Gecko/2017117 Firefox/7.0
• Mozilla/5.0 (PPC; rv:8.0) Gecko/2012914 Firefox/8.0
• Mozilla/5.0 (PPC; rv:3.0) Gecko/201277 Firefox/3.0
• Mozilla/5.0 (PPC; rv:15.0) Gecko/2002124 Firefox/15.0
• Mozilla/5.0 (PPC; rv:6.0) Gecko/201068 Firefox/6.0
• Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:0.9.3) Gecko/20010802
• Mozilla/5.0 (Macintosh; U; PPC; de-DE; rv:0.9.2) Gecko/20010726 Netscape6/6.1
• Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:1.0.2) Gecko/20030208 Netscape/7.02
• Mozilla/4.0 (compatible; MSIE 5.0; Mac_PowerPC) Opera 5.0 [en]
• Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:1.2b) Gecko/20021016
• Mozilla/5.0 (Macintosh; U; PPC; de-DE; rv:1.0.2) Gecko/20030208 Netscape/7.02
• Mozilla/5.0 (PPC; rv:14.0) Gecko/2003614 Firefox/14.0
• Mozilla/4.0 (compatible; MSIE 5.0; Mac_PowerPC) Opera 5.12 [en]
• Mozilla/5.0 (Macintosh; U; PPC Mac OS; en) iCab 3
• Mozilla/5.0 (Macintosh; U; PPC; ja-JP; rv:1.0.2) Gecko/20030208 Netscape/7.02
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-US; rv:1.0.2) Gecko/20021120 Netscape/7.01
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; rv:1.7.2) Gecko/20040804 Netscape/7.2
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2
• Mozilla/5.0 (Macintosh; U; PPC; en-US; mimic; rv:9.3.0) Clecko/20120101 Classilla/CFM
• Mozilla/4.0 (compatible; MSIE 5.13; Mac_PowerPC)
• Mozilla/4.0 (compatible; MSIE 5.17; Mac_PowerPC Mac OS; en)
• Mozilla/5.0 (Macintosh; U; PPC; fr-FR; rv:1.0.2) Gecko/20021120 Netscape/7.01
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X; fr-FR; rv:1.0.2) Gecko/20030208 Netscape/7.02
• Mozilla/5.0 (compatible; iCab 3.0.5; Macintosh; U; PPC Mac OS)
• Mozilla/5.0 (Macintosh; U; PPC; fr-FR; rv:1.0.2) Gecko/20030208 Netscape/7.02
• Mozilla/4.7C-CCK-MCD {C-UDP; EBM-APPLE} (Macintosh; I; PPC)
• Mozilla/5.0 (PPC; rv:3.0) Gecko/200894 Firefox/3.0
• Mozilla/4.0 (compatible; MSIE 5.22; Mac_PowerPC)
• Mozilla/5.0 (PPC; rv:3.0) Gecko/20151014 Firefox/3.0
• iTunes/6.0 (Macintosh; N; PPC)
• iTunes/6.0.5 (Macintosh; N; PPC)
• Mozilla/4.0 (compatible; MSIE 4.5; Mac_PowerPC)
• iTunes/2.0.4 (Macintosh; N; PPC)
• Mozilla/4.51 (Macintosh; I; PPC)
• iCab/3.0.5 (Macintosh; U; PPC Mac OS)
• Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:1.0.2) Gecko/20021216
• iTunes/3.0 (Macintosh; N; PPC; en-US)
• iTunes/4.7.1 (Linux; N; Synology DiskStation (DSM Package Management); PPC_QORIQ; DA; utf8) SqueezeCenter, Squeezebox Server, Logitech Media Server/7.7.2/33893
• iTunes/8.2.1 (Macintosh; N; PPC)
• iTunes/6.0.2 (Macintosh; N; PPC)
• Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:1.0.2) Gecko/20021120 Netscape/7.01
• iTunes/4.7 (Macintosh; N; PPC)
• Mozilla/5.0 (PPC; rv:20.0; N;) Gecko/20060504 Firefox/20.0
• Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:1.0rc2) Gecko/20020512 Netscape/7.0b1
• Mozilla/4.5 [fr] (Macintosh; U; PPC)
• Mozilla/4.0 (compatible; MSIE 5.0; Mac_PowerPC) Opera 6.0 [de]
• Mozilla/4.08 (Macintosh; I; PPC, Nav)
• iCab/2.9.1 (Macintosh; U; PPC)
• Mozilla/3.0 (Macintosh; I; PPC)
• Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:1.2a) Gecko/20020910
• iTunes/4.6 (Macintosh; N; PPC)
• Mozilla/5.0 (Macintosh; U; PPC; en-US; mimic; rv:9.3.0) Gecko/20120117 Firefox/3.6.25 Classilla/CFM
• Mozilla/4.0 (compatible; MSIE 5.16; Mac_PowerPC)
• Opera/8.01 (Macintosh; U; PPC Mac OS; en)
• Cyberdog/2.0 (Macintosh; PPC)
• Mozilla/5.0 (X11; MorphOS ppc64; rv:88.0) Gecko/20100101 Firefox/88.0
• Mozilla/5.0 (Macintosh; U; PPC; en-US; rv:0.9.4.1) Gecko/20020318 Netscape6/6.2.2
• Mozilla/5.0 (compatible; iCab 3.0.2; Macintosh; U; PPC Mac OS)
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7) Gecko/20040614 Firefox/0.9
• Mozilla/4.0 (compatible; MSIE 5.23; Mac_PowerPC) Opera 7.54 [en]
• Mozilla/4.0 (compatible; MSIE 6.0; Mac_PowerPC; en) Opera 9.24
• Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.6; ru; rv:1.9.2.28) Gecko/20120306 Firefox/3.6.28
• Mozilla/4.0 (compatible; MSIE 5.23; Macintosh; PPC) Escape 5.1.8